subject:(In flight de icing)

1. Droz, Christophe. Guidage des ondes d'ordre élevé dans les composites : application au dégivrage en vol des pales d'hélicoptères : High-order wave propagation in composite waveguides : application to in-flight de-icing of helicopter rotor blades.

Degree: Docteur es, Dynamique des structures, 2015, Ecully, Ecole centrale de Lyon

URL: http://www.theses.fr/2015ECDL0026

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Lorsqu’un hélicoptère opère dans des conditions givrantes extrêmes, l’accumulation de glace sur les pales peut considérablement impacter les performances de l’appareil. De nombreuses recherches portant… (more)

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Lorsqu’un hélicoptère opère dans des conditions givrantes extrêmes, l’accumulation de glace sur les pales peut considérablement impacter les performances de l’appareil. De nombreuses recherches portant sur le développement d’un système de dégivrage à faible consommation et moindre coût ont été initiées ces dernières années. Dans cette thèse, une technique ondulatoire de protection contre la formation de glace sur les surfaces des pales d’hélicoptères est étudiée. La stratégie proposée repose sur l’utilisation d’ondes guidées d’ordre élevé spécifiques pour créer des cisaillements dépassant la force d’adhésion surfacique d’un profil de glace. Des essais ont d’abord été menés pour réaliser le modèle E.F. d’un tronçon de pale, puis une stratégie de réduction de modèle est développée pour la Méthode des Éléments Finis Ondulatoires. Cette formulation s’appuie sur la projection des vecteurs d’état sur une base réduite, constituée des formes d’ondes progressives. Elle permet de réaliser des analyses ondulatoires large-bande dans les structures complexes, 1D ou 2D périodiques. Les ondes guidées sont d’abord examinées dans la pale d’hélicoptère, puis les effets de localisation et de conversion des ondes sont interprétés dans divers guides d’ondes 1D et 2D. Les interactions de ces ondes d’ordre élevé avec les profils d’accrétion de glace, ainsi qu’avec plusieurs types de singularités structurelles, sont analysées au moyen d’une Méthode des Matrices de Diffusion. Une formulation ondulatoire temporelle est ensuite proposée pour l’analyse rapide de la propagation d’un train d’ondes dans les guides d’ondes couplés. Enfin, un réseau d’actionneurs est conçu pour la génération de trains d’ondes d’ordre élevé, et des validations temporelles sont réalisées dans une plaque composite ainsi que dans une pale de Super Puma.

When helicopters fly through extreme conditions, ice can aggregate on their blades and seriously affect the aircraft performances. Recently, an increasing research effort was devoted to the development of affordable low power de-icing solutions. In this thesis, a wave-based approach is adopted to prevent and/or remove ice aggregates from the surfaces of helicopter rotor blades. The de-icing strategy uses specific high-order guided waves to exceed the shear adhesion strength of ice accretion profiles. Experiments are conducted in order to update the FE model of a realistic rotor blade, then a Model Order Reduction strategy is developed for the Wave Finite Element Method. It involves a projection of the state vectors on a reduced basis of propagating waves shapes, and enables broadband wave analysis in structurally advanced 1D and 2D periodic structures. Guided wave propagation is studied within a helicopter rotor blade, and wave localization and conversion effects are discussed in various 1D and 2D composite waveguides. The interactions of high-order waves with ice aggregates and other types of structural singularities are also examined by means of a Diffusion Matrix Method. Then, time-domain propagation in coupled…

Advisors/Committee Members: Ichchou, Mohamed (thesis director).

Subjects/Keywords: Pales d'hélicoptères; Dégivrage en vol; Helicopter rotor; In-flight de-icing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Droz, C. (2015). Guidage des ondes d'ordre élevé dans les composites : application au dégivrage en vol des pales d'hélicoptères : High-order wave propagation in composite waveguides : application to in-flight de-icing of helicopter rotor blades. (Doctoral Dissertation). Ecully, Ecole centrale de Lyon. Retrieved from http://www.theses.fr/2015ECDL0026

Chicago Manual of Style (16^th Edition):

Droz, Christophe. “Guidage des ondes d'ordre élevé dans les composites : application au dégivrage en vol des pales d'hélicoptères : High-order wave propagation in composite waveguides : application to in-flight de-icing of helicopter rotor blades.” 2015. Doctoral Dissertation, Ecully, Ecole centrale de Lyon. Accessed March 03, 2021. http://www.theses.fr/2015ECDL0026.

MLA Handbook (7^th Edition):

Droz, Christophe. “Guidage des ondes d'ordre élevé dans les composites : application au dégivrage en vol des pales d'hélicoptères : High-order wave propagation in composite waveguides : application to in-flight de-icing of helicopter rotor blades.” 2015. Web. 03 Mar 2021.

Vancouver:

Droz C. Guidage des ondes d'ordre élevé dans les composites : application au dégivrage en vol des pales d'hélicoptères : High-order wave propagation in composite waveguides : application to in-flight de-icing of helicopter rotor blades. [Internet] [Doctoral dissertation]. Ecully, Ecole centrale de Lyon; 2015. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2015ECDL0026.

Council of Science Editors:

Droz C. Guidage des ondes d'ordre élevé dans les composites : application au dégivrage en vol des pales d'hélicoptères : High-order wave propagation in composite waveguides : application to in-flight de-icing of helicopter rotor blades. [Doctoral Dissertation]. Ecully, Ecole centrale de Lyon; 2015. Available from: http://www.theses.fr/2015ECDL0026

Iowa State University

2. Al-Masri, Faisal. Experimental investigation on the icing physics and anti-/de-Icing technology of an aircraft pitot probe.

Degree: 2020, Iowa State University

URL: https://lib.dr.iastate.edu/etd/18269

► Pitot probes are one of the most important components of an airplane, directly responsible for the flight safety and secure decisions of pilots by providing… (more)

▼ Pitot probes are one of the most important components of an airplane, directly responsible for the flight safety and secure decisions of pilots by providing crucial airspeed and altitude data. They are constantly at risk of performance deterioration due to ice accretion that can block the stagnation port, thereby, providing incorrect readings to the pilot that can lead to fatal accidents if not treated immediately. By leveraging the unique Icing Research Tunnel at Iowa State University (i.e., ISU-IRT) a series of experimental studies are conducted to investigate the dynamic ice accretion process over the surface of a commonly-used aircraft pitot probe and to evaluate the effectiveness of various anti-/de-icing methods for Pitot probe icing mitigation. During the experiments, in addition to using a high-resolution imaging system to record the dynamic ice accretion and anti-/de-icing processes over the surface of the Pitot probe under different icing test conditions, a high-speed Infrared (IR) thermal imaging system is also used to map the corresponding surface temperature distributions on the Pitot probe in order to characterize the unsteady heat transfer process associated with the ice accretion and anti-/de-icing process. In addition to performing a parametric study to evaluate the performance of a conventional thermal-based icing protection system embedded inside the Pitot-probe as a function of the electric power input for the anti-/de-icing operation, a novel hybrid icing protection strategy is proposed that combines the electric heating with a bio-inspired superhydrophobic (SHS) coating to coat the Pitot probe in order to minimize the power consumption for the anti-/de-icing operation. In comparison to that required by the conventional thermal-based system to heat up the Pitot probe brutally for icing protection, the proposed hybrid strategy is found to be able to achieve completely ice free conditions over the entire surface of the Pitot probe with only about 35% of the required power input (i.e., up to 65% power consumption) for the anti-/de-icing operation.

Subjects/Keywords: De-Icing; Icing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Al-Masri, F. (2020). Experimental investigation on the icing physics and anti-/de-Icing technology of an aircraft pitot probe. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/18269

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Al-Masri, Faisal. “Experimental investigation on the icing physics and anti-/de-Icing technology of an aircraft pitot probe.” 2020. Thesis, Iowa State University. Accessed March 03, 2021. https://lib.dr.iastate.edu/etd/18269.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Al-Masri, Faisal. “Experimental investigation on the icing physics and anti-/de-Icing technology of an aircraft pitot probe.” 2020. Web. 03 Mar 2021.

Vancouver:

Al-Masri F. Experimental investigation on the icing physics and anti-/de-Icing technology of an aircraft pitot probe. [Internet] [Thesis]. Iowa State University; 2020. [cited 2021 Mar 03]. Available from: https://lib.dr.iastate.edu/etd/18269.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Al-Masri F. Experimental investigation on the icing physics and anti-/de-Icing technology of an aircraft pitot probe. [Thesis]. Iowa State University; 2020. Available from: https://lib.dr.iastate.edu/etd/18269

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo

3. Geiger, Paul. Simulation of In-Flight Rime Icing Using a Non-Body-Fitted Mesh.

Degree: 2020, University of Waterloo

URL: http://hdl.handle.net/10012/15810

► In-flight rime icing occurs when supercooled droplets strike the surface of an aircraft and instantly freeze. This often occurs in the high moisture, cold environments… (more)

▼ In-flight rime icing occurs when supercooled droplets strike the surface of an aircraft and instantly freeze. This often occurs in the high moisture, cold environments of clouds and is of major concern to aircraft manufacturers and pilots due to safety issues, as the icing degrades the aerodynamic performance of the plane. Rime icing models are important in their own right and as a step towards more complex glaze ice/mixed ice models. Most current commercially available software use boundary-fitted approaches to the air and droplet phases along with a node-displacement method for the boundary. This can cause issues as the node-displacement approach to the boundary can cause tangles in the boundary which are unphysical, and the boundary-fitted methodologies require remeshing after each ice accretion step which can degrade mesh quality and cause crashes. The goal of this thesis is to create a non-boundary-fitted approach towards rime icing simulations. Level set methodologies, which are unsusceptible to tangles, are used to handle the evolution of the boundaries. Static meshes which are Cartesian in the vicinity of the boundary are used, and high Reynolds wall functions are incorporated into the methodology so that the meshes can be made coarser and solutions can be reached faster. This proposed model is implemented via modifications of the OpenFOAM® 5.0 open-source environment. Where possible, results are compared to experimental results and to the commercially available FENSAP-ICE software by ANSYS, Inc. Immersed boundary and cut-cell methodologies are explored for the droplets near the boundary. It was found that the developed cut-cell methodology is about twice as accurate as the immersed boundary method developed and that this is one of the dominant discretization errors in many tests. It was shown that as droplet size goes down, particularly below 10 μm, differences in-between the FENSAP-ICE and the proposed model start increasing, with the total collection efficiency going from 0.2% different in-between the models for droplets of size 35.52 μm up to as much as 300% for 4.96 μm, and it is suggested that modifications to the model and discretization be made before tests for sub-10 μm mean-value droplet diameter (MVD) are run, although these tend to be rarely encountered in nature as most droplets tend to range from 10-50 μm. For simulation using a MVD of 16 μm and a 7-bin Langmuir-D distribution, it was found that the model differed in total collection predictions from FENSAP-ICE by 0.8%, and by 2.9% using just the MVD, as the smallest droplets contribute very little to the net collection. Using a pseudo-steady-state, multistep icing procedure, it was found that over a NACA23012 airfoil at a 2⁰ angle of attack, the total accreted ice for a 1-step ice accretion differed by 0.21% from FENSAP-ICE results, and for a 4-step test, it differed by 0.11% with similar resultant ice shapes when a developed model for the ending time-step which increases the global conservation was used, and by 17% for a 1-step…

Subjects/Keywords: in-flight icing; rime icing; immersed boundary method; cut-cell method; finite volume method; level set method; non-body-fitted mesh

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APA (6^th Edition):

Geiger, P. (2020). Simulation of In-Flight Rime Icing Using a Non-Body-Fitted Mesh. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15810

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Geiger, Paul. “Simulation of In-Flight Rime Icing Using a Non-Body-Fitted Mesh.” 2020. Thesis, University of Waterloo. Accessed March 03, 2021. http://hdl.handle.net/10012/15810.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Geiger, Paul. “Simulation of In-Flight Rime Icing Using a Non-Body-Fitted Mesh.” 2020. Web. 03 Mar 2021.

Vancouver:

Geiger P. Simulation of In-Flight Rime Icing Using a Non-Body-Fitted Mesh. [Internet] [Thesis]. University of Waterloo; 2020. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10012/15810.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Geiger P. Simulation of In-Flight Rime Icing Using a Non-Body-Fitted Mesh. [Thesis]. University of Waterloo; 2020. Available from: http://hdl.handle.net/10012/15810

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

4. Pena, Dorian. Développement d'un code de givrage tridimensionnel avec méthode Level-Set : Development of a three-dimensional icing code using level-set method.

Degree: Docteur es, Mécanique des fluides, 2016, Strasbourg; Ecole polytechnique (Montréal, Canada)

URL: http://www.theses.fr/2016STRAD014

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Le travail réalisé dans cette thèse introduit le concept de l'utilisation de la méthode Level-Set pour simuler l'interface Glace/Air au cours du temps lors du… (more)

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Le travail réalisé dans cette thèse introduit le concept de l'utilisation de la méthode Level-Set pour simuler l'interface Glace/Air au cours du temps lors du processus de givrage en vol des aéronefs. Pour cela, un code de givrage tri-dimensionnel multi-blocs et parallélisé a été implémenté au sein du solveur NSMB (Navier-Stokes-Multi-Blocks). Il comprend notamment un module de calcul des trajectoires des gouttelettes par une approche Eulérienne compatible avec l'utilisation de grilles chimères et un module thermodynamique pour le calcul des masses de glace incluant deux modèles différents : un modèle algébrique itératif et un modèle à dérivées partielles. Une attention particulière a été portée sur la vérification du code de givrage implémenté en comparant systématiquement, si possible, les résultats obtenus avec les données expérimentales et numériques existantes dans la littérature. Pour cette raison, le module de déformation de maillage existant dans NSMB a été intégré au code implémenté afin de pouvoir simuler le givrage par une méthode traditionnelle. Enfin, un nouveau principe pour le suivi de l'interface glace/air est introduit via l'utilisation d'une méthode Level-Set. Puisque dans ce travail de thèse nous nous intéressons particulièrement au concept, la méthode Level-Set développée est d'ordre un et est résolue implicitement. On montrera cependant que des résultats valides sont obtenus avec une telle approximation.

This thesis introduces the concept of the Level-Set method for simulating the evolution through time of the ice/air interface during the process of in-flight aircraft icing. For that purpose, a three-dimensionnal multi-block and parallelized icing code have been implemented in the NSMB flow solver (Navier-Stokes-Multi-Blocks). It includes a module for calculating the droplet trajectories by an Eulerian approach compatible with the use of chimera grids and a thermodynamic module to calculate the ice masses including two different models : an iterative algebraic model and a PDE model. Particular attention was paid to the validation of the icing code irnplemented by comparing results with existing experimental and numerical data in the literature. For this reason, the existing mesh deformation algorithm in NSMB was integrated into the code to simulate icing by a traditional method. Finally a new principle to track the ice/air interface is introduced using the Level-Set method. Since we are particularly interested in the concept, the Level-Set method developped is first order and solved implicitly. However it will be shown that valid results are obtained with such an approximation.

Advisors/Committee Members: Hoarau, Yannick (thesis director), Laurendeau, Eric (thesis director).

Subjects/Keywords: Givrage; Méthode Eulérienne de transport de particules; Thermodynamique du givrage; Méthode Level-Set; Méthode chimère; Icing; Eulerian approach; Process of in-flight aircraft icing; Level-Set method; Chimeria method; Navier-Stokes-Multi-Blocks; 629.1; 532.5

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pena, D. (2016). Développement d'un code de givrage tridimensionnel avec méthode Level-Set : Development of a three-dimensional icing code using level-set method. (Doctoral Dissertation). Strasbourg; Ecole polytechnique (Montréal, Canada). Retrieved from http://www.theses.fr/2016STRAD014

Chicago Manual of Style (16^th Edition):

Pena, Dorian. “Développement d'un code de givrage tridimensionnel avec méthode Level-Set : Development of a three-dimensional icing code using level-set method.” 2016. Doctoral Dissertation, Strasbourg; Ecole polytechnique (Montréal, Canada). Accessed March 03, 2021. http://www.theses.fr/2016STRAD014.

MLA Handbook (7^th Edition):

Pena, Dorian. “Développement d'un code de givrage tridimensionnel avec méthode Level-Set : Development of a three-dimensional icing code using level-set method.” 2016. Web. 03 Mar 2021.

Vancouver:

Pena D. Développement d'un code de givrage tridimensionnel avec méthode Level-Set : Development of a three-dimensional icing code using level-set method. [Internet] [Doctoral dissertation]. Strasbourg; Ecole polytechnique (Montréal, Canada); 2016. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2016STRAD014.

Council of Science Editors:

Pena D. Développement d'un code de givrage tridimensionnel avec méthode Level-Set : Development of a three-dimensional icing code using level-set method. [Doctoral Dissertation]. Strasbourg; Ecole polytechnique (Montréal, Canada); 2016. Available from: http://www.theses.fr/2016STRAD014

5. Andersson, Daniel. The performance of an iced aircraft wing.

Degree: Engineering Science, 2011, University West

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4098

► The goal of this thesis work has been to develop and manufacture an ice layer which was to be mounted on the tip of… (more)

Subjects/Keywords: Airfoil; ice layer; in-flight icing; wind tunnel; rapid prototyping; lift force

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Andersson, D. (2011). The performance of an iced aircraft wing. (Thesis). University West. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Andersson, Daniel. “The performance of an iced aircraft wing.” 2011. Thesis, University West. Accessed March 03, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Andersson, Daniel. “The performance of an iced aircraft wing.” 2011. Web. 03 Mar 2021.

Vancouver:

Andersson D. The performance of an iced aircraft wing. [Internet] [Thesis]. University West; 2011. [cited 2021 Mar 03]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Andersson D. The performance of an iced aircraft wing. [Thesis]. University West; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Iowa State University

6. Li, Haixing. Experimental studies on the dynamics of in-flight and impacting water droplets pertinent to aircraft icing phenomena.

Degree: 2017, Iowa State University

URL: https://lib.dr.iastate.edu/etd/15564

► Aircraft icing is widely recognized as a significant hazard to aircraft operations in cold weather. When an aircraft or rotorcraft fly in a cold climate,… (more)

▼ Aircraft icing is widely recognized as a significant hazard to aircraft operations in cold weather. When an aircraft or rotorcraft fly in a cold climate, some of the super-cooled water droplets would impact and freeze on the exposed aircraft surfaces to form ice shapes, which can degrade the aerodynamic performance of an airplane significantly by decreasing lift while increasing drag, and even lead to the aircraft crash. In the present study, a series of experimental investigations were conducted to investigate dynamics and thermodynamics of in-flight and impinging water droplets in order to elucidate the underlying physics of the important microphysical process pertinent to aircraft icing phenomena. A novel lifetime-based molecular tagging thermometry technique (MTT) is developed to achieve simultaneous measurements of droplet size, flying velocity and transient temperature of in-flight water droplets to characterize the dynamic and thermodynamic behaviors of the micro-sized in-flight droplets pertinent to aircraft icing phenomena. By using high-speed imaging and infrared thermal imaging techniques, a comprehensive experimental study was conducted to quantify the unsteady heat transfer and phase changing processes as water droplets impinging onto frozen cold surfaces under different test conditions (i.e., with different Weber numbers, Reynolds numbers, and impact angles of the impinging droplets, different temperature, hydrophobicity and roughness of the test plates) to simulate the scenario of super-cooled water droplets impinging onto the frozen cold wing surfaces. A novel digital image projector (DIP) technique was also developed to achieve time-resolved film thickness measurements to quantify the dynamic impinging process of water droplets (i.e., droplet impact, rebounding, splashing and freezing process). An impact droplet maximum spreading diameter model and a damped harmonic oscillator model was proposed based on precise measurement of the impact droplet 3D shape. A better understanding of the important micro physical processes pertinent to aircraft icing phenomena would lead to better ice accretion models for more accurate prediction of ice formation and accretion on aircraft wings as well as develop more effective and robust anti-/de-icing strategies for safer and more efficient operation of aircraft in cold weather.

Subjects/Keywords: 3-D shape reconstruction of impact droplet; Aircraft icing; Droplet impact dynamics; Droplet impact on super-hydrophobic surface; In-flight droplets temperature measurement; Aerospace Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, H. (2017). Experimental studies on the dynamics of in-flight and impacting water droplets pertinent to aircraft icing phenomena. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/15564

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Li, Haixing. “Experimental studies on the dynamics of in-flight and impacting water droplets pertinent to aircraft icing phenomena.” 2017. Thesis, Iowa State University. Accessed March 03, 2021. https://lib.dr.iastate.edu/etd/15564.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Li, Haixing. “Experimental studies on the dynamics of in-flight and impacting water droplets pertinent to aircraft icing phenomena.” 2017. Web. 03 Mar 2021.

Vancouver:

Li H. Experimental studies on the dynamics of in-flight and impacting water droplets pertinent to aircraft icing phenomena. [Internet] [Thesis]. Iowa State University; 2017. [cited 2021 Mar 03]. Available from: https://lib.dr.iastate.edu/etd/15564.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Li H. Experimental studies on the dynamics of in-flight and impacting water droplets pertinent to aircraft icing phenomena. [Thesis]. Iowa State University; 2017. Available from: https://lib.dr.iastate.edu/etd/15564

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

7. Soltis, Jared T. Design and Testing of an Erosion Resistant Ultrasonic De-icing System for Rotorcraft Blades.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/19062

► The goal of this research was to design a helicopter rotor blade lead edge that had high sand erosion resistance and was conducive to ultrasonic… (more)

▼ The goal of this research was to design a helicopter rotor blade lead edge that had high sand erosion resistance and was conducive to ultrasonic ice protection systems (IPSs). The first section of research tried to tailor the leading edge to promote ice interfacial transverse shear stress created by the ultrasonic vibration of piezoelectric actuators. Previous work done to tailor leading edges removed material from the inside of the cap. However, there were concerns about structural integrity and erosion wear when material was removed. A new system of adding material to the inside of the leading edge instead of removing material to create stress concentrations was researched for this thesis. Finite element analysis was used to determine the optimal locations for the discontinuities for the ultrasonic IPS. The discontinuities located in the optimal location are called Tailored Stress Concentrators (TSCs). Using the finite element results, it was determined that the best location for the TSCs were in regions of normally low stress in the baseline model before the addition of the TSCs. The addition of the TSCs creates stress concentrations as well as increased the original local maximum stresses. Initial models showed increases in average interfacial shear stress of 20%. Since the first FEM was not practical to construct as a bench top experiment, a second model was developed. Next, a bench top experiment and matching finite element model were built to validate the finite element analysis. The finite element model predicted a decrease of 9% in interfacial shear stress when TSCs were added to the bench top model. The bench top experiments confirmed the ineffectiveness of TSCs. There was no reduction in power required to de-ice when the TSCs were added to the bench top model. The next part of the research focused on the material used for the leading edge erosion cap. Coating systems based on titanium nitride (TiN) applied via cathodic arc physical vapor deposition (CA-PVD) were developed for rotorcraft erosion caps to protect against sand and rain erosion. Erosion resistant materials must also be compatible with ice protection systems. The ice adhesion strength of titanium nitride and titanium aluminum nitride (TiAlN) were evaluated experimentally and compared to the ice adhesion strength of uncoated metallic materials currently used on rotor blade leading edge caps: stainless steel 430, Inconel 625, and titanium grade 2. Experimental studies presented in this paper investigated which environmental and material parameters are most influential on impact ice adhesion strength. The effects of median volumetric diameter, liquid water content, ambient temperature, surface roughness, and material grain direction were tested on stainless steel 430. Tests revealed that surface roughness and temperature have the greatest effect on ice adhesion strength. There was an increase in adhesion strength of 670% from -8°C to -16°C and 250% increase from 24 Ra µin to 105 Ra µin. An increase in water droplet size from 20 µm to 40 µm… Advisors/Committee Members: Jose Palacios, Thesis Advisor/Co-Advisor, Douglas Edward Wolfe, Thesis Advisor/Co-Advisor.

Subjects/Keywords: aircraft icing; de-icing systems; ice adhesion strength; ultrasonic de-icing; erosion resistant materials

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Soltis, J. T. (2013). Design and Testing of an Erosion Resistant Ultrasonic De-icing System for Rotorcraft Blades. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/19062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Soltis, Jared T. “Design and Testing of an Erosion Resistant Ultrasonic De-icing System for Rotorcraft Blades.” 2013. Thesis, Penn State University. Accessed March 03, 2021. https://submit-etda.libraries.psu.edu/catalog/19062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Soltis, Jared T. “Design and Testing of an Erosion Resistant Ultrasonic De-icing System for Rotorcraft Blades.” 2013. Web. 03 Mar 2021.

Vancouver:

Soltis JT. Design and Testing of an Erosion Resistant Ultrasonic De-icing System for Rotorcraft Blades. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 03]. Available from: https://submit-etda.libraries.psu.edu/catalog/19062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Soltis JT. Design and Testing of an Erosion Resistant Ultrasonic De-icing System for Rotorcraft Blades. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/19062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

8. Mattei, André Luiz Pierre. Consciência situacional em voo de sistemas aéreos não tripulados.

Degree: PhD, Ciências de Computação e Matemática Computacional, 2015, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/55/55134/tde-03122015-105313/ ;

►

Este trabalho apresenta os principais conceitos de um modelo de referência, chamado de Consciência Situacional em Voo (In-Flight Awareness, IFA), e sua implementação embarcada IFA2S… (more)

Subjects/Keywords: Conciência situacional em voo; Flight safety; In-flight awareness; In-Flight awareness; Segurança de voo; STPA; STPA; UAV; VANT

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APA (6^th Edition):

Mattei, A. L. P. (2015). Consciência situacional em voo de sistemas aéreos não tripulados. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/55/55134/tde-03122015-105313/ ;

Chicago Manual of Style (16^th Edition):

Mattei, André Luiz Pierre. “Consciência situacional em voo de sistemas aéreos não tripulados.” 2015. Doctoral Dissertation, University of São Paulo. Accessed March 03, 2021. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-03122015-105313/ ;.

MLA Handbook (7^th Edition):

Mattei, André Luiz Pierre. “Consciência situacional em voo de sistemas aéreos não tripulados.” 2015. Web. 03 Mar 2021.

Vancouver:

Mattei ALP. Consciência situacional em voo de sistemas aéreos não tripulados. [Internet] [Doctoral dissertation]. University of São Paulo; 2015. [cited 2021 Mar 03]. Available from: http://www.teses.usp.br/teses/disponiveis/55/55134/tde-03122015-105313/ ;.

Council of Science Editors:

Mattei ALP. Consciência situacional em voo de sistemas aéreos não tripulados. [Doctoral Dissertation]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/55/55134/tde-03122015-105313/ ;

Brno University of Technology

9. Málek, Jan. Experimentální výzkum směsí proti tvorbě námrazy trolejových vedení: Experimental research of fluids against icing of overhead wires.

Degree: 2020, Brno University of Technology

URL: http://hdl.handle.net/11012/193091

► In this thesis, commercially available anti-icing fluids were tested. A methodology of assessment was designed for the effect of anti-icing fluids on the rapidity of… (more)

Subjects/Keywords: trolej; námraza; protinámrazová směs; ledovka; contact wire; catenary; anti-icing; de-icing; icing; rime; ice

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APA (6^th Edition):

Málek, J. (2020). Experimentální výzkum směsí proti tvorbě námrazy trolejových vedení: Experimental research of fluids against icing of overhead wires. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/193091

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Málek, Jan. “Experimentální výzkum směsí proti tvorbě námrazy trolejových vedení: Experimental research of fluids against icing of overhead wires.” 2020. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/193091.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Málek, Jan. “Experimentální výzkum směsí proti tvorbě námrazy trolejových vedení: Experimental research of fluids against icing of overhead wires.” 2020. Web. 03 Mar 2021.

Vancouver:

Málek J. Experimentální výzkum směsí proti tvorbě námrazy trolejových vedení: Experimental research of fluids against icing of overhead wires. [Internet] [Thesis]. Brno University of Technology; 2020. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/193091.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Málek J. Experimentální výzkum směsí proti tvorbě námrazy trolejových vedení: Experimental research of fluids against icing of overhead wires. [Thesis]. Brno University of Technology; 2020. Available from: http://hdl.handle.net/11012/193091

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

10. Smékal, Aleš. Odmrazovací soustavy letadel: Aircraft de-icing systems.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/33535

► The bachelor´s thesis is familiarization of me with icing on aircrafts. It includes the distribution systems for anti-icing and de-icing, energy intensity and efficiency are… (more)

Subjects/Keywords: Námraza; protinámrazový; letadlové systémy; led; odmrazování; Icing; anti-icing; aircraft systems; ice; de-icing

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APA (6^th Edition):

Smékal, A. (2019). Odmrazovací soustavy letadel: Aircraft de-icing systems. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/33535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Smékal, Aleš. “Odmrazovací soustavy letadel: Aircraft de-icing systems.” 2019. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/33535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Smékal, Aleš. “Odmrazovací soustavy letadel: Aircraft de-icing systems.” 2019. Web. 03 Mar 2021.

Vancouver:

Smékal A. Odmrazovací soustavy letadel: Aircraft de-icing systems. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/33535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Smékal A. Odmrazovací soustavy letadel: Aircraft de-icing systems. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/33535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

11. Fazekaš, Slavomír. Odmrazovací soustavy letadel: Aircraft de-icing systems.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/27286

► The aim of my bachelor thesis is to make the acquaintance of the danger of ice coating on airplanes, it s creation and the way… (more)

Subjects/Keywords: Lietadlo; námraza; lietadlové systémy; protinámrazový systém; odmrazovanie; Aircraft; icing; aircraft systems; anti-icing; de-icing

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APA (6^th Edition):

Fazekaš, S. (2018). Odmrazovací soustavy letadel: Aircraft de-icing systems. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/27286

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fazekaš, Slavomír. “Odmrazovací soustavy letadel: Aircraft de-icing systems.” 2018. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/27286.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fazekaš, Slavomír. “Odmrazovací soustavy letadel: Aircraft de-icing systems.” 2018. Web. 03 Mar 2021.

Vancouver:

Fazekaš S. Odmrazovací soustavy letadel: Aircraft de-icing systems. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/27286.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fazekaš S. Odmrazovací soustavy letadel: Aircraft de-icing systems. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/27286

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Van den Broecke, J. (author). Efficiency and de-icing capability of nanosecond pulsed dielectric barrier discharge plasma actuators.

Degree: 2016, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:945c1293-c61b-48e0-a40c-7ce20a05d100

►

In this work a study was performed on the electrical, fluid-mechanical and net efficiency of nanosecond-pulsed dielectric barrier discharge (ns-DBD) plasma actuators. The plasma actuator… (more)

Subjects/Keywords: Plasma actuator; ns-DBD; de-icing

11 more images…

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APA (6^th Edition):

Van den Broecke, J. (. (2016). Efficiency and de-icing capability of nanosecond pulsed dielectric barrier discharge plasma actuators. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:945c1293-c61b-48e0-a40c-7ce20a05d100

Chicago Manual of Style (16^th Edition):

Van den Broecke, J (author). “Efficiency and de-icing capability of nanosecond pulsed dielectric barrier discharge plasma actuators.” 2016. Masters Thesis, Delft University of Technology. Accessed March 03, 2021. http://resolver.tudelft.nl/uuid:945c1293-c61b-48e0-a40c-7ce20a05d100.

MLA Handbook (7^th Edition):

Van den Broecke, J (author). “Efficiency and de-icing capability of nanosecond pulsed dielectric barrier discharge plasma actuators.” 2016. Web. 03 Mar 2021.

Vancouver:

Van den Broecke J(. Efficiency and de-icing capability of nanosecond pulsed dielectric barrier discharge plasma actuators. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Mar 03]. Available from: http://resolver.tudelft.nl/uuid:945c1293-c61b-48e0-a40c-7ce20a05d100.

Council of Science Editors:

Van den Broecke J(. Efficiency and de-icing capability of nanosecond pulsed dielectric barrier discharge plasma actuators. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:945c1293-c61b-48e0-a40c-7ce20a05d100

University of Alberta

13. Lopera, Adrian. Metallic Flame-Sprayed Coatings as Anti-Icing and De-Icing Systems for Wind Turbines.

Degree: MS, Department of Mechanical Engineering, 2015, University of Alberta

URL: https://era.library.ualberta.ca/files/j3860975b

► Ice accretion is a problem that affects the performance and safety of structures that are exposed to cold weather environments. In wind energy production, a… (more)

Subjects/Keywords: Flame Spray; Ice accretion; Joule Heating; Anti-Icing; Wind Turbines; De-icing; Thermal Spray

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APA (6^th Edition):

Lopera, A. (2015). Metallic Flame-Sprayed Coatings as Anti-Icing and De-Icing Systems for Wind Turbines. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/j3860975b

Chicago Manual of Style (16^th Edition):

Lopera, Adrian. “Metallic Flame-Sprayed Coatings as Anti-Icing and De-Icing Systems for Wind Turbines.” 2015. Masters Thesis, University of Alberta. Accessed March 03, 2021. https://era.library.ualberta.ca/files/j3860975b.

MLA Handbook (7^th Edition):

Lopera, Adrian. “Metallic Flame-Sprayed Coatings as Anti-Icing and De-Icing Systems for Wind Turbines.” 2015. Web. 03 Mar 2021.

Vancouver:

Lopera A. Metallic Flame-Sprayed Coatings as Anti-Icing and De-Icing Systems for Wind Turbines. [Internet] [Masters thesis]. University of Alberta; 2015. [cited 2021 Mar 03]. Available from: https://era.library.ualberta.ca/files/j3860975b.

Council of Science Editors:

Lopera A. Metallic Flame-Sprayed Coatings as Anti-Icing and De-Icing Systems for Wind Turbines. [Masters Thesis]. University of Alberta; 2015. Available from: https://era.library.ualberta.ca/files/j3860975b

Penn State University

14. Borigo, Cody J. A Novel Actuator Phasing Method for Ultrasonic De-icing of Aircraft Structures.

Degree: 2014, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/23379

► Aircraft icing is a critical concern for commercial and military rotorcraft and fixed-wing aircraft. In-flight icing can lead to dramatic decreases in lift and increases… (more)

▼ Aircraft icing is a critical concern for commercial and military rotorcraft and fixed-wing aircraft. In-flight icing can lead to dramatic decreases in lift and increases in drag that have caused more than a thousand deaths and hundreds of accidents over the past three decades alone. Current ice protection technologies have substantial drawbacks due to weight, power consumption, environmental concerns, or incompatibility with certain structures. In this research, an actuator phasing method for ultrasonic de-icing of aircraft structures was developed and tested using a series of finite element models, 3D scanning laser Doppler vibrometer measurements, and experimental de-icing tests on metallic and composite structures including plates and airfoils. An independent actuator analysis method was developed to allow for practical evaluation of many actuator phasing scenarios using a limited number of finite element models by properly calculating the phased stress fields and electromechanical impedance curves using a complex coupled impedance model. A genetic algorithm was utilized in conjunction with a series of finite element models to demonstrate that phase inversion, in which only in-phase and anti-phase signal components are applied to actuators, can be utilized with a small number of phasing combinations to achieve substantial improvements in de-icing system coverage. Finite element models of a 48”-long airfoil predicted that phase inversion with frequency sweeping can provide an improvement in the shear stress coverage levels of up to 90% compared to frequency sweeping alone. Experimental evaluation of the phasing approach on an icing grid showed a 189% improvement in de-icing coverage compared to frequency sweeping alone at comparable power levels. 3D scanning laser Doppler vibrometer measurements confirmed the increased variation in the surface vibration field induced by actuator phasing compared to unphased frequency sweeping. Additional contributions were made to facilitate actuator phasing and to advance the state-of-the-art in ultrasonic de-icing technology. These contributions include the development of improved frequency optimization, reduction in the size of the system hardware, and improvements in actuator bonding techniques. It was demonstrated that a dynamic frequency selection method is critical to effectively implementing the actuator phasing method. A miniaturized relay system was also designed and implemented to facilitate actuator phasing in conjunction with a phase splitter circuit and a single amplifier. An improved frequency tuning method was adopted and implemented in the de-icing system to eliminate the need for an impedance analyzer and to provide more accurate frequency selection by directly measuring the forward and reflected power between the amplifier and the de-icing actuators. Overall, it was demonstrated that this novel method can greatly improve the efficiency and effectiveness of the ultrasonic de-icing system by effectively redistributing the shear stress fields at the ice-structure… Advisors/Committee Members: Joseph Lawrence Rose, Dissertation Advisor/Co-Advisor, Joseph Lawrence Rose, Committee Chair/Co-Chair, Clifford Jesse Lissenden Iii, Committee Member, Bernhard R Tittmann, Committee Member, Edward C Smith, Committee Member.

Subjects/Keywords: de-icing; aircraft; ultrasound; ultrasonic; vibration; ice protection; anti-icing; phasing; piezoelectric

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APA (6^th Edition):

Borigo, C. J. (2014). A Novel Actuator Phasing Method for Ultrasonic De-icing of Aircraft Structures. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/23379

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Borigo, Cody J. “A Novel Actuator Phasing Method for Ultrasonic De-icing of Aircraft Structures.” 2014. Thesis, Penn State University. Accessed March 03, 2021. https://submit-etda.libraries.psu.edu/catalog/23379.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Borigo, Cody J. “A Novel Actuator Phasing Method for Ultrasonic De-icing of Aircraft Structures.” 2014. Web. 03 Mar 2021.

Vancouver:

Borigo CJ. A Novel Actuator Phasing Method for Ultrasonic De-icing of Aircraft Structures. [Internet] [Thesis]. Penn State University; 2014. [cited 2021 Mar 03]. Available from: https://submit-etda.libraries.psu.edu/catalog/23379.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Borigo CJ. A Novel Actuator Phasing Method for Ultrasonic De-icing of Aircraft Structures. [Thesis]. Penn State University; 2014. Available from: https://submit-etda.libraries.psu.edu/catalog/23379

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

15. Overmeyer, Austin David. Actuator Bondline Optimization and Experimental Deicing of a Rotor Blade Ultrasonic Deicing System.

Degree: 2012, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/13760

► The ultrasonic deicing concept has shown the ability to promote ice shedding in prior wind tunnel test efforts. In this prior research, the ultrasonic deicing… (more)

▼ The ultrasonic deicing concept has shown the ability to promote ice shedding in prior wind tunnel test efforts. In this prior research, the ultrasonic deicing prototypes failed due to actuator fracture and debonding from the host structure. The goal of this research is to advance the ultrasonic deicing technology towards a robust integrated system that achieves repeatable ice shedding. Finite Element Models (FEM) are used to predict the ultrasonic ice transverse shear stresses responsible for ice shedding. The FEM tools are experimentally validated and guidelines for mesh requirements are established. To accurately predict the dynamic response of the ultrasonic deicing system, the ultrasonic damping ratio is required. The ultrasonic damping ratio of a representative system excited at the first ultrasonic mode (~28.5 kHz) is measured to be 0.1885%. The FEMs predictions are validated by correlating experimental electro-mechanical impedance measurements. The discrepancy between the FEM predictions and experiments is determined to be 0.7% for the ultrasonic resonant frequency, 8% for the impedance and 5% for the out-of-plane velocities at this mode. The FEM tools are then utilized to guide the design of an optimized bondline between the PZT actuators and the host structure forming the ultrasonic deicing system. The optimized bondline provides the maximum ice interfacial transverse shear stresses and prevents debonding failures of the system. Details on the optimized system fabrication and integration are provided. The optimized bondline configuration is experimentally validated to increase the ice interface transverse shear stresses by 15% with respect to prior bondline approaches. To predict ice shedding due to excitation of an ultrasonic deicing system, an ultrasonic deicing rotor ice shedding prediction model is developed. The model couples a commercially available FEM with post processors to predict the ice shedding locations. The centrifugal, ice adhesion and cohesive forces are accounted for in the prediction of the shedding iv locations. The model is initially used to determine the critical ice adhesion area required to achieve ice shedding. If the critical ice adhesion area is reached, ice shedding is promoted. Based on a theoretical study for a generic rotor setup, (1.42 radius rotor, 400 RPM, 6.35 mm thick x 30.48 cm ice shape at the rotor tip) the critical ice adhesion area is determined to be 9%. To achieve the critical ice adhesion area, a multi-frequency excitation is suggested to distribute ice interfacial transverse shear stresses to avoid areas of ice bridging (local ice adhesion). The novel bondline approach is implemented to a rotor blade leading edge erosion cap representative structure (0.813 mm thick stainless steel leading edge). The test specimen is tested under impact icing and centrifugal environments (390 gs). The system is evaluated with a comprehensive set of rotational impact icing experiments within the FAR Part 25/29 Appendix C icing envelopes. Ice shedding was promoted for test cases… Advisors/Committee Members: Jose Palacios, Thesis Advisor/Co-Advisor, Edward Smith, Thesis Advisor/Co-Advisor, George A Lesieutre, Thesis Advisor/Co-Advisor.

Subjects/Keywords: deicing; de-icing; icing; ultrasonic; electro-thermal; low power; ice protection; helicopter; rotor blades

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APA (6^th Edition):

Overmeyer, A. D. (2012). Actuator Bondline Optimization and Experimental Deicing of a Rotor Blade Ultrasonic Deicing System. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13760

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Overmeyer, Austin David. “Actuator Bondline Optimization and Experimental Deicing of a Rotor Blade Ultrasonic Deicing System.” 2012. Thesis, Penn State University. Accessed March 03, 2021. https://submit-etda.libraries.psu.edu/catalog/13760.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Overmeyer, Austin David. “Actuator Bondline Optimization and Experimental Deicing of a Rotor Blade Ultrasonic Deicing System.” 2012. Web. 03 Mar 2021.

Vancouver:

Overmeyer AD. Actuator Bondline Optimization and Experimental Deicing of a Rotor Blade Ultrasonic Deicing System. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 03]. Available from: https://submit-etda.libraries.psu.edu/catalog/13760.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Overmeyer AD. Actuator Bondline Optimization and Experimental Deicing of a Rotor Blade Ultrasonic Deicing System. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/13760

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota

16. Anderson, Evan. Detection of Ice and De-Icing/Anti-Icing Fluids on Aircraft Surfaces Using Time Domain Reflectometry.

Degree: MS, Chemistry, 2014, University of Minnesota

URL: http://hdl.handle.net/11299/181789

► Time domain reflectometry is a practical and effective way to detect ice, frost, moisture, anti-icing/de-icing aircraft fluids (ADAFs), and mixtures of each on aircraft surfaces.… (more)

Subjects/Keywords: ADAFs; Anti-Icing Fluids; De-Icing Fluids; Dielectric Impedance Spectroscopy; TDR; Time Domain Reflectometry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Anderson, E. (2014). Detection of Ice and De-Icing/Anti-Icing Fluids on Aircraft Surfaces Using Time Domain Reflectometry. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/181789

Chicago Manual of Style (16^th Edition):

Anderson, Evan. “Detection of Ice and De-Icing/Anti-Icing Fluids on Aircraft Surfaces Using Time Domain Reflectometry.” 2014. Masters Thesis, University of Minnesota. Accessed March 03, 2021. http://hdl.handle.net/11299/181789.

MLA Handbook (7^th Edition):

Anderson, Evan. “Detection of Ice and De-Icing/Anti-Icing Fluids on Aircraft Surfaces Using Time Domain Reflectometry.” 2014. Web. 03 Mar 2021.

Vancouver:

Anderson E. Detection of Ice and De-Icing/Anti-Icing Fluids on Aircraft Surfaces Using Time Domain Reflectometry. [Internet] [Masters thesis]. University of Minnesota; 2014. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11299/181789.

Council of Science Editors:

Anderson E. Detection of Ice and De-Icing/Anti-Icing Fluids on Aircraft Surfaces Using Time Domain Reflectometry. [Masters Thesis]. University of Minnesota; 2014. Available from: http://hdl.handle.net/11299/181789

Brno University of Technology

17. Blažek, Michal. Možnosti hodnocení trvanlivosti povrchové vrstvy betonu stavebních konstrukcí: Possibilities of evaluation durability of the surface layer of concrete structures.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/30438

► The thesis is focused on possibilities of durability evaluation of surface layer of concrete structures. The durability of concrete surface layer usually determines the durability… (more)

Subjects/Keywords: Trvanlivost; propustnost; betonové konstrukce; porozita; mrazuvzdornost; rozmrazovací látky; pevnost betonu v tlaku.; Durability; permeability; concrete structures; porosity; freeze-thaw resistance; de-icing agents; strength in the press of concrete.

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APA (6^th Edition):

Blažek, M. (2018). Možnosti hodnocení trvanlivosti povrchové vrstvy betonu stavebních konstrukcí: Possibilities of evaluation durability of the surface layer of concrete structures. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/30438

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Blažek, Michal. “Možnosti hodnocení trvanlivosti povrchové vrstvy betonu stavebních konstrukcí: Possibilities of evaluation durability of the surface layer of concrete structures.” 2018. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/30438.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Blažek, Michal. “Možnosti hodnocení trvanlivosti povrchové vrstvy betonu stavebních konstrukcí: Possibilities of evaluation durability of the surface layer of concrete structures.” 2018. Web. 03 Mar 2021.

Vancouver:

Blažek M. Možnosti hodnocení trvanlivosti povrchové vrstvy betonu stavebních konstrukcí: Possibilities of evaluation durability of the surface layer of concrete structures. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/30438.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Blažek M. Možnosti hodnocení trvanlivosti povrchové vrstvy betonu stavebních konstrukcí: Possibilities of evaluation durability of the surface layer of concrete structures. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/30438

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech

18. Ali, Muhammad Anttho. In-cloud ice accretion modeling on wind turbine blades using an extended Messinger model.

Degree: MS, Aerospace Engineering, 2015, Georgia Tech

URL: http://hdl.handle.net/1853/53870

► Wind turbines often operate under cold weather conditions where icing may occur. Icing causes the blade sections to stall prematurely reducing the power production at… (more)

Subjects/Keywords: Wind turbine icing; Wind energy in cold climate; Ice accretion modeling on wind turbines; Wind turbine performance under icing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ali, M. A. (2015). In-cloud ice accretion modeling on wind turbine blades using an extended Messinger model. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/53870

Chicago Manual of Style (16^th Edition):

Ali, Muhammad Anttho. “In-cloud ice accretion modeling on wind turbine blades using an extended Messinger model.” 2015. Masters Thesis, Georgia Tech. Accessed March 03, 2021. http://hdl.handle.net/1853/53870.

MLA Handbook (7^th Edition):

Ali, Muhammad Anttho. “In-cloud ice accretion modeling on wind turbine blades using an extended Messinger model.” 2015. Web. 03 Mar 2021.

Vancouver:

Ali MA. In-cloud ice accretion modeling on wind turbine blades using an extended Messinger model. [Internet] [Masters thesis]. Georgia Tech; 2015. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1853/53870.

Council of Science Editors:

Ali MA. In-cloud ice accretion modeling on wind turbine blades using an extended Messinger model. [Masters Thesis]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/53870

Università degli studi di Bergamo

19. Antonini, Carlo. Superhydrophobicity as a strategy against icing. Analysis of the water/surface dynamic interaction for icing mitigation.

Degree: 2011, Università degli studi di Bergamo

URL: http://hdl.handle.net/10446/881

► The thesis illustrates the efforts made to proof how water repellent surfaces can help reducing ice accretion in icing conditions: tests performed in an icing… (more)

Subjects/Keywords: Aircraft icing; icing mitigation; anti-icing; de-icing; icing protection; superhydrophobicity; superhydrophobic surfaces; SHS; superhydrophobic coatings; wettability; drop impact; contact angle; high speed video; ING-IND/09 - Sistemi per l'Energia e L'Ambiente

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APA (6^th Edition):

Antonini, C. (2011). Superhydrophobicity as a strategy against icing. Analysis of the water/surface dynamic interaction for icing mitigation. (Thesis). Università degli studi di Bergamo. Retrieved from http://hdl.handle.net/10446/881

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Antonini, Carlo. “Superhydrophobicity as a strategy against icing. Analysis of the water/surface dynamic interaction for icing mitigation.” 2011. Thesis, Università degli studi di Bergamo. Accessed March 03, 2021. http://hdl.handle.net/10446/881.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Antonini, Carlo. “Superhydrophobicity as a strategy against icing. Analysis of the water/surface dynamic interaction for icing mitigation.” 2011. Web. 03 Mar 2021.

Vancouver:

Antonini C. Superhydrophobicity as a strategy against icing. Analysis of the water/surface dynamic interaction for icing mitigation. [Internet] [Thesis]. Università degli studi di Bergamo; 2011. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10446/881.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Antonini C. Superhydrophobicity as a strategy against icing. Analysis of the water/surface dynamic interaction for icing mitigation. [Thesis]. Università degli studi di Bergamo; 2011. Available from: http://hdl.handle.net/10446/881

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Southern University

20. Das, Jyoti B. Optimizing Anti-icing Operation for Winter Roadway Treatment Using A Decision-Making Tool.

Degree: MS, Civil Engineering, Department of Civil Engineering and Construction, 2020, Georgia Southern University

URL: https://digitalcommons.georgiasouthern.edu/etd/2106

► Managing winter roadway treatment can be a challenge where winter is not severe, but snowfall is experienced a few times a year. Winter weather… (more)

Subjects/Keywords: Winter road maintenance; Winter road treatment; Anti-icing; de-icing; Pre-treatment; Winter operation; Civil Engineering; Hydraulic Engineering; Transportation Engineering

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APA (6^th Edition):

Das, J. B. (2020). Optimizing Anti-icing Operation for Winter Roadway Treatment Using A Decision-Making Tool. (Masters Thesis). Georgia Southern University. Retrieved from https://digitalcommons.georgiasouthern.edu/etd/2106

Chicago Manual of Style (16^th Edition):

Das, Jyoti B. “Optimizing Anti-icing Operation for Winter Roadway Treatment Using A Decision-Making Tool.” 2020. Masters Thesis, Georgia Southern University. Accessed March 03, 2021. https://digitalcommons.georgiasouthern.edu/etd/2106.

MLA Handbook (7^th Edition):

Das, Jyoti B. “Optimizing Anti-icing Operation for Winter Roadway Treatment Using A Decision-Making Tool.” 2020. Web. 03 Mar 2021.

Vancouver:

Das JB. Optimizing Anti-icing Operation for Winter Roadway Treatment Using A Decision-Making Tool. [Internet] [Masters thesis]. Georgia Southern University; 2020. [cited 2021 Mar 03]. Available from: https://digitalcommons.georgiasouthern.edu/etd/2106.

Council of Science Editors:

Das JB. Optimizing Anti-icing Operation for Winter Roadway Treatment Using A Decision-Making Tool. [Masters Thesis]. Georgia Southern University; 2020. Available from: https://digitalcommons.georgiasouthern.edu/etd/2106

Iowa State University

21. Gao, Linyue. Experimental investigations on wind turbine icing physics and anti-/de-icing technology.

Degree: 2019, Iowa State University

URL: https://lib.dr.iastate.edu/etd/17184

► Wind turbine icing has been found to cause a variety of problems to the safe and efficient operations of wind turbines. Ice accretion on turbine… (more)

▼ Wind turbine icing has been found to cause a variety of problems to the safe and efficient operations of wind turbines. Ice accretion on turbine blades would result in decreasing lift and increasing drag, thereby, leading to power reduction. The annual power loss due to icing was found to be 20 ~ 50% at harsh sites. Ice accretion and irregular ice shedding during wind turbine operation would lead to load imbalances and excessive turbine vibrations, which may cause structural failures, especially when coupled with strong wind loads. Icing issues can also directly impact personnel safety due to falling and projected large ice chunks. By leveraging the Icing Research Tunnel of Iowa State University (ISU-IRT), a series of experimental investigations were conducted to investigate the dynamic ice accretion process over the surfaces of typical wind turbine blade models and to explore the effective and robust anti-/de-icing strategies for wind turbines icing mitigation. More specifically, a comprehensive experimental study was conducted to quantify the transient surface water transport behavior over the ice accreting surface of typical wind turbine blade models by using a Digital Image Projection (DIP) technique. The aerodynamic performance degradation of the turbine blade models was characterized in the course of the ice accreting process by using two sets of high-sensitive multi-axis force/moment systems and a digital Particle Image Velocimetry (PIV) system. A novel hybrid anti-icing strategy that combines minimized electro-heating near the turbine blade leading edge and bio-inspired icephobic coatings to cover the blade surface was proposed. In comparison to conventional thermal-based anti-/de-icing methods to brutally heat the entire blade surface, the proposed hybrid strategy was demonstrated to be able to prevent the ice formation and accretion over the surfaces of the wind turbine blades effectively with only ~10% of the required power consumption. In addition to conducting wind tunnel experiments, a field campaign was also conducted in a mountainous wind farm to investigate the ice-induced performance degradation of multi-megawatt wind turbines by correlating the acquired images of ice accretion over the rotating wind turbine blades with an unmanned aerial vehicle (UAV) with the turbine operational data recorded by wind turbine supervisory control and data acquisition (SCADA) systems. The new findings derived from the present studies would lead to a better understanding of the underlying physics pertinent to the wind turbine icing phenomena, which could be used to improve current ice accretion models for more accurate prediction of ice accretion on wind turbine blades as well as to develop innovative anti-/de-icing strategies for safer and more efficient operation of wind turbines in cold weathers.

Subjects/Keywords: aerodynamic performance degradation; anti/de-icing; field measurement; glaze ice; superhydrophobic coating; wind turbine icing; Aerospace Engineering

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APA (6^th Edition):

Gao, L. (2019). Experimental investigations on wind turbine icing physics and anti-/de-icing technology. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/17184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gao, Linyue. “Experimental investigations on wind turbine icing physics and anti-/de-icing technology.” 2019. Thesis, Iowa State University. Accessed March 03, 2021. https://lib.dr.iastate.edu/etd/17184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gao, Linyue. “Experimental investigations on wind turbine icing physics and anti-/de-icing technology.” 2019. Web. 03 Mar 2021.

Vancouver:

Gao L. Experimental investigations on wind turbine icing physics and anti-/de-icing technology. [Internet] [Thesis]. Iowa State University; 2019. [cited 2021 Mar 03]. Available from: https://lib.dr.iastate.edu/etd/17184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gao L. Experimental investigations on wind turbine icing physics and anti-/de-icing technology. [Thesis]. Iowa State University; 2019. Available from: https://lib.dr.iastate.edu/etd/17184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

22. Zima, Martin. CFD analýza tvorby námrazy na letounu kategorie commuter: CFD analysis of icing effects on commuter aircraft configuration.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/175530

► The Diploma Thesis concerns investigation of icing effects at L 410 NG aircraft. The aircraft is certified under FAR/CS/AP-23 Commuter category. An analysis was performed… (more)

Subjects/Keywords: CFD analýza; FENSAP-ICE; námraza v letectví; pneumatický odledňovací systém; CFD analysis; FENSAP-ICE; aircraft icing; Pneumatic De-icing Boots System

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APA (6^th Edition):

Zima, M. (2019). CFD analýza tvorby námrazy na letounu kategorie commuter: CFD analysis of icing effects on commuter aircraft configuration. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/175530

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zima, Martin. “CFD analýza tvorby námrazy na letounu kategorie commuter: CFD analysis of icing effects on commuter aircraft configuration.” 2019. Thesis, Brno University of Technology. Accessed March 03, 2021. http://hdl.handle.net/11012/175530.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zima, Martin. “CFD analýza tvorby námrazy na letounu kategorie commuter: CFD analysis of icing effects on commuter aircraft configuration.” 2019. Web. 03 Mar 2021.

Vancouver:

Zima M. CFD analýza tvorby námrazy na letounu kategorie commuter: CFD analysis of icing effects on commuter aircraft configuration. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11012/175530.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zima M. CFD analýza tvorby námrazy na letounu kategorie commuter: CFD analysis of icing effects on commuter aircraft configuration. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/175530

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Kim, Jee Woong. Development of a physics based methodology for the prediction of rotor blade ice formation.

Degree: PhD, Aerospace Engineering, 2015, Georgia Tech

URL: http://hdl.handle.net/1853/54390

► Modern helicopters, civilian and military alike, are expected to operate in all weather conditions. Ice accretion adversely affects the availability, affordability, safety and survivability. Availability… (more)

▼ Modern helicopters, civilian and military alike, are expected to operate in all weather conditions. Ice accretion adversely affects the availability, affordability, safety and survivability. Availability of the vehicle may be compromised if the ice formation requires excessive torque to overcome the drag needed to operate the rotor. Affordability is affected by the power requirements and cost of ownership of the deicing systems needed to safely operate the vehicle. Equipment of the rotor blades with built-in heaters greatly increases the cost of the helicopter and places further demands on the engine. The safety of the vehicle is also compromised due to ice shedding events, and the onset of abrupt, unexpected stall phenomena attributable to ice formation. Given the importance of understanding the effects of icing on aircraft performance and certification, considerable work has been done on the development of analytical and empirical tools, accompanied by high quality wind tunnel and flight test data. In this work, numerical studies to improve ice growth modeling have been done by reducing limitations and empiricism inherent in existing ice accretion models. In order to overcome the weakness of Lagrangian approach in unsteady problem such as rotating blades, a water droplet solver based on 3-D Eulerian method is developed and integrated into existing CFD solver. Also, the differences between the industry standard ice accretion analyses such as LEWICE and the ice accretion models based on the extended Messinger model are investigated through a number of 2-D airfoil and 3-D rotor blade ice accretion studies. The developed ice accretion module based on 3-D Eulerian water droplet method and the extended Messinger model is also coupled with an existing empirical ice shedding model. A series of progressively challenging simulations have been carried out. These include ability of the solvers to model airloads over an airfoil with a prescribed/simulated ice shape, collection efficiency modeling, ice growth, ice shedding, de-icing modeling, and assessment of the degradation of airfoil or rotor performance associated with the ice formation. While these numerical simulation results are encouraging, much additional work remains in modeling detailed physics important to rotorcraft icing phenomena. Despite these difficulties, progress in assessing helicopter ice accretion has been made and tools for initial analyses have been developed.Modern helicopters, civilian and military alike, are expected to operate in all weather conditions. Ice accretion adversely affects the availability, affordability, safety and survivability. Availability of the vehicle may be compromised if the ice formation requires excessive torque to overcome the drag needed to operate the rotor. Affordability is affected by the power requirements and cost of ownership of the deicing systems needed to safely operate the vehicle. Equipment of the rotor blades with built-in heaters greatly increases the cost of the helicopter and places further demands on the… Advisors/Committee Members: Sankar, Lakshmi N. (advisor), Schrage, Daniel P. (committee member), Jagoda, Jeff (committee member), Prasad, J. V. R. (committee member), Marpu, Ritu P. (committee member).

Subjects/Keywords: Rotorcraft; CFD; Icing; De-icing; Ice shedding

…past [41 - 45] to model the phenomenon of in-flight de-icing. Stallabrass [46… …finite spanwise extent of the heating elements has been developed in order to improve de-icing… …different types of ice. Aircraft icing is defined as flight in cloud at temperatures at or below… …focused on wind tunnel and flight tests. In 1981 and 1983, icing and deicing tests have been… …significantly affect ice shape. Flight tests in icing condition were performed on a UH-1H helicopter…

7 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kim, J. W. (2015). Development of a physics based methodology for the prediction of rotor blade ice formation. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54390

Chicago Manual of Style (16^th Edition):

Kim, Jee Woong. “Development of a physics based methodology for the prediction of rotor blade ice formation.” 2015. Doctoral Dissertation, Georgia Tech. Accessed March 03, 2021. http://hdl.handle.net/1853/54390.

MLA Handbook (7^th Edition):

Kim, Jee Woong. “Development of a physics based methodology for the prediction of rotor blade ice formation.” 2015. Web. 03 Mar 2021.

Vancouver:

Kim JW. Development of a physics based methodology for the prediction of rotor blade ice formation. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1853/54390.

Council of Science Editors:

Kim JW. Development of a physics based methodology for the prediction of rotor blade ice formation. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/54390

Universitetet i Tromsø

24. Solangi, Ali Raza. Icing Effects on Power Lines and Anti-icing and De-icing Methods .

Degree: 2018, Universitetet i Tromsø

URL: http://hdl.handle.net/10037/14198

► Icing on power lines may lead to compromise safety and reliability of electric supply network. Prolong icing can lead to power breakdown and collapse of… (more)

Subjects/Keywords: VDP::Technology: 500; VDP::Teknologi: 500; Anti-icing /De-icing methods; Electrical power network; Ice calculation models; Sensors; Conductors; Insulators

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APA (6^th Edition):

Solangi, A. R. (2018). Icing Effects on Power Lines and Anti-icing and De-icing Methods . (Masters Thesis). Universitetet i Tromsø. Retrieved from http://hdl.handle.net/10037/14198

Chicago Manual of Style (16^th Edition):

Solangi, Ali Raza. “Icing Effects on Power Lines and Anti-icing and De-icing Methods .” 2018. Masters Thesis, Universitetet i Tromsø. Accessed March 03, 2021. http://hdl.handle.net/10037/14198.

MLA Handbook (7^th Edition):

Solangi, Ali Raza. “Icing Effects on Power Lines and Anti-icing and De-icing Methods .” 2018. Web. 03 Mar 2021.

Vancouver:

Solangi AR. Icing Effects on Power Lines and Anti-icing and De-icing Methods . [Internet] [Masters thesis]. Universitetet i Tromsø 2018. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10037/14198.

Council of Science Editors:

Solangi AR. Icing Effects on Power Lines and Anti-icing and De-icing Methods . [Masters Thesis]. Universitetet i Tromsø 2018. Available from: http://hdl.handle.net/10037/14198

Penn State University

25. Drury, Matthew David. Full Scale Testing of a Centrifugally Powered Pneumatic De-Icing System for Helicopter Rotor Blades.

Degree: 2016, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/28639

► A full-scale centrifugally powered pneumatic deicing system for helicopter blades was developed. The designed system makes use of the pressure differential created within a spinning… (more)

▼ A full-scale centrifugally powered pneumatic deicing system for helicopter blades was developed. The designed system makes use of the pressure differential created within a spinning rotor blade to deform a 0.03 in. (0.762 mm) thick metallic leading edge cap, producing the transverse shear stresses necessary to delaminate accreted ice. Two prototype designs were fabricated and parametrically tested. Both designs consist of a stainless steel leading edge cap tied to the blade surface via flexible stainless steel ribs. The leading edge section is sealed to the blade surface such that it can be pressurized, inflating and deflating as a microvalve is cycled between high and low pressure lines that run along the blade span. Both designs were fabricated and installed on a truncated 12 in. (0.3048 m.) span K-MAX blade section. Icing testing of the prototypes was conducted at The Pennsylvania State University Adverse Environment Rotor Test Stand. Input pressures representative of those produced by centrifugal pressures generated along a full-scale 24 ft. (7.3 m.) radius blade rotating at 270 RPM were provided to the prototypes via a pneumatic slip ring. Parametric testing of the two configurations demonstrated the superiority of one of the designs. The selected configuration was reproduced and installed on the outboard 8 ft. section of a full-scale 24 ft. (7.3 m.) K-MAX blade. Full-scale icing testing was conducted at Kaman’s whirl tower during the month of February. A portable icing cloud generator capable of providing 40 minutes of continuous icing through 12 NASA Standard icing nozzles was developed to provide representative icing conditions. A second cloud generator providing uncontrolled water droplet sizes was also implemented due to power availability limitations to operate the portable icing cloud generation system. The full-scale system was tested at static air temperatures within the Federal Aviation Regulation (FAR) Part 25/29 icing envelope and was able to delaminate ice thicknesses as small as 0.08 in. (2.03 mm.) at 270 RPM. Advisors/Committee Members: Jose Palacios, Thesis Advisor/Co-Advisor.

Subjects/Keywords: ice; de-icing system; centrifugal pumping; rotor blade

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APA (6^th Edition):

Drury, M. D. (2016). Full Scale Testing of a Centrifugally Powered Pneumatic De-Icing System for Helicopter Rotor Blades. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/28639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Drury, Matthew David. “Full Scale Testing of a Centrifugally Powered Pneumatic De-Icing System for Helicopter Rotor Blades.” 2016. Thesis, Penn State University. Accessed March 03, 2021. https://submit-etda.libraries.psu.edu/catalog/28639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Drury, Matthew David. “Full Scale Testing of a Centrifugally Powered Pneumatic De-Icing System for Helicopter Rotor Blades.” 2016. Web. 03 Mar 2021.

Vancouver:

Drury MD. Full Scale Testing of a Centrifugally Powered Pneumatic De-Icing System for Helicopter Rotor Blades. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Mar 03]. Available from: https://submit-etda.libraries.psu.edu/catalog/28639.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Drury MD. Full Scale Testing of a Centrifugally Powered Pneumatic De-Icing System for Helicopter Rotor Blades. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/28639

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Houston

26. Chang, Christiana. Multifunctional Carbon-Polymer Composites for Temperature Sensing and De-Icing.

Degree: PhD, Mechanical Engineering, 2013, University of Houston

URL: http://hdl.handle.net/10657/1090

► This dissertation presents the work conducted on two major projects: 1) a structurally integrated, continuous carbon fiber heating element based polymer composite system for the… (more)

Subjects/Keywords: Carbon fiber; Carbon nanofibers; Carbon nanotubes; Nanocomposites; Piezoresistivity; De-icing

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APA (6^th Edition):

Chang, C. (2013). Multifunctional Carbon-Polymer Composites for Temperature Sensing and De-Icing. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/1090

Chicago Manual of Style (16^th Edition):

Chang, Christiana. “Multifunctional Carbon-Polymer Composites for Temperature Sensing and De-Icing.” 2013. Doctoral Dissertation, University of Houston. Accessed March 03, 2021. http://hdl.handle.net/10657/1090.

MLA Handbook (7^th Edition):

Chang, Christiana. “Multifunctional Carbon-Polymer Composites for Temperature Sensing and De-Icing.” 2013. Web. 03 Mar 2021.

Vancouver:

Chang C. Multifunctional Carbon-Polymer Composites for Temperature Sensing and De-Icing. [Internet] [Doctoral dissertation]. University of Houston; 2013. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10657/1090.

Council of Science Editors:

Chang C. Multifunctional Carbon-Polymer Composites for Temperature Sensing and De-Icing. [Doctoral Dissertation]. University of Houston; 2013. Available from: http://hdl.handle.net/10657/1090

University of Manitoba

27. Ghazy, Ahmed. Concrete pavements: deterioration due to de-icing salts and repair.

Degree: Civil Engineering, 2017, University of Manitoba

URL: http://hdl.handle.net/1993/32848

► With intensive use of chloride-based ice control chemicals for winter maintenance operations (de-icing, anti-icing and pre-wetting), concrete pavements may undergo significant alterations resulting in adverse… (more)

▼ With intensive use of chloride-based ice control chemicals for winter maintenance operations (de-icing, anti-icing and pre-wetting), concrete pavements may undergo significant alterations resulting in adverse consequences on their engineering properties. Formation of complex salts (oxychlorides) has been suspected for causing chemical degradation of concrete pavements, but without direct microstructural evidence due to their instability. Thus, an effort was made to elucidate the damage mechanisms of field and laboratory concrete exposed to the most widely used chloride-based de-icing salts (individual and combined) under different exposure conditions. This thesis aimed at capturing/linking the formation of these complex phases, if any, with the physico-mechanical properties of real cementitious systems/concretes and proposing their roles in the damage process. Also, this thesis explored the potential benefits of supplementary cementitious materials (SCMs: fly ash and nanosilica) and portland limestone cement (PLC) to mitigate this type of damage. The results indicated that the deterioration of concrete in the field is explained by a combination of physical and chemical aspects, due to the interaction of salts, freezing/thawing (F/T) and wetting/drying (W/D) cycles with the hydrated paste. Formation of acicular flattened blades of 3- and 5-form magnesium oxychloride (MOX) and tiny fibrous crystals, as well as subhedral pseudo-hexagonal calcium oxychloride plates (COX), were found in the deteriorated concrete specimens, depending on the type of solution. The overall results indicated that the restrictive limits on fly ash in concrete serving in chloride-rich environments may produce less durable concrete than alternative noncompliant mixtures with higher fly ash dosages. Moreover, the performance of the concrete was much enhanced by an innovative SCM such as nanosilica. PLC mixtures also exhibited better resistance to de-icing salts due to dual physical and chemical actions of limestone in the matrix. This thesis also aimed at introducing adaptive neuro-fuzzy inference systems to model the behavior of the concrete mixtures under various exposure regimes combined with de-icing salts. Finally, the thesis aimed at developing durable repair materials (nano-modified fly ash concrete) and enhancing the overall process of rehabilitating concrete pavements to achieve optimum performance, longevity and life-cycle cost effectiveness. Advisors/Committee Members: Bassuoni, Mohamed (Civil Engineering) (supervisor), Shalaby, Ahmed (Civil Engineering).

Subjects/Keywords: Concrete Pavement; De-icing Salts; Freeze-thaw cycles; Wet-dry cycles

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APA (6^th Edition):

Ghazy, A. (2017). Concrete pavements: deterioration due to de-icing salts and repair. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32848

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ghazy, Ahmed. “Concrete pavements: deterioration due to de-icing salts and repair.” 2017. Thesis, University of Manitoba. Accessed March 03, 2021. http://hdl.handle.net/1993/32848.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ghazy, Ahmed. “Concrete pavements: deterioration due to de-icing salts and repair.” 2017. Web. 03 Mar 2021.

Vancouver:

Ghazy A. Concrete pavements: deterioration due to de-icing salts and repair. [Internet] [Thesis]. University of Manitoba; 2017. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1993/32848.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ghazy A. Concrete pavements: deterioration due to de-icing salts and repair. [Thesis]. University of Manitoba; 2017. Available from: http://hdl.handle.net/1993/32848

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

KTH

28. Wen, Yingrong. IMPACTS OF ROAD DE-ICING SALTS ON MANGANESE TRANSPORT TO GROUNDWATER IN ROADSIDE SOILS.

Degree: Environmental Geochemistry and Ecotechnology, 2012, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109261

► Manganese (Mn) is an important element in soil, it occur natural in minerals and precipitated as Mn-oxides. Several factors could decide the solubility and… (more)

Subjects/Keywords: Manganese; Mn-oxides; De-icing salts; Leaching test; Ion exchange; Groundwater

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wen, Y. (2012). IMPACTS OF ROAD DE-ICING SALTS ON MANGANESE TRANSPORT TO GROUNDWATER IN ROADSIDE SOILS. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109261

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wen, Yingrong. “IMPACTS OF ROAD DE-ICING SALTS ON MANGANESE TRANSPORT TO GROUNDWATER IN ROADSIDE SOILS.” 2012. Thesis, KTH. Accessed March 03, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109261.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wen, Yingrong. “IMPACTS OF ROAD DE-ICING SALTS ON MANGANESE TRANSPORT TO GROUNDWATER IN ROADSIDE SOILS.” 2012. Web. 03 Mar 2021.

Vancouver:

Wen Y. IMPACTS OF ROAD DE-ICING SALTS ON MANGANESE TRANSPORT TO GROUNDWATER IN ROADSIDE SOILS. [Internet] [Thesis]. KTH; 2012. [cited 2021 Mar 03]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109261.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wen Y. IMPACTS OF ROAD DE-ICING SALTS ON MANGANESE TRANSPORT TO GROUNDWATER IN ROADSIDE SOILS. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109261

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

KTH

29. Jonsson, Sanna. Corrosion of zinc in the automotive environment ‐ Relation Between Corrosion Rate, Corrosion Products and Exposure Site.

Degree: Chemical Science and Engineering (CHE), 2012, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158494

► In a previous project, mobile exposures in road environments have been performed in various areas of the world. A number of materials and coatings… (more)

Subjects/Keywords: zinc; atmospheric corrosion; automotive environment; de‐icing salt; corrosion products

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jonsson, S. (2012). Corrosion of zinc in the automotive environment ‐ Relation Between Corrosion Rate, Corrosion Products and Exposure Site. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158494

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jonsson, Sanna. “Corrosion of zinc in the automotive environment ‐ Relation Between Corrosion Rate, Corrosion Products and Exposure Site.” 2012. Thesis, KTH. Accessed March 03, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158494.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jonsson, Sanna. “Corrosion of zinc in the automotive environment ‐ Relation Between Corrosion Rate, Corrosion Products and Exposure Site.” 2012. Web. 03 Mar 2021.

Vancouver:

Jonsson S. Corrosion of zinc in the automotive environment ‐ Relation Between Corrosion Rate, Corrosion Products and Exposure Site. [Internet] [Thesis]. KTH; 2012. [cited 2021 Mar 03]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158494.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jonsson S. Corrosion of zinc in the automotive environment ‐ Relation Between Corrosion Rate, Corrosion Products and Exposure Site. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158494

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

30. De Koning, M.K. (author). The influence of de-icing salts on the remobilization of heavy metals in an artificial wetland.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:3fb56858-db8a-4712-b337-01f218c81d5f

► Artificial wetlands are used at different locations in the world as a treatment facility for wastewater of different composition. In order of Rijkswaterstaat several artificial… (more)

▼ Artificial wetlands are used at different locations in the world as a treatment facility for wastewater of different composition. In order of Rijkswaterstaat several artificial wetlands are constructed for road runoff treatment. In all cases the artificial wetland is preceded by a sedimentation basin / storage buffer. One of them is located along the A1 near ‘t Gooi. A research on the purification efficiency of this wetland shows higher metal concentrations in the effluent in wintertime (Tromp, Helofyteninfiltratiesystemen voor zuivering wegwater, 2005). This is probably due to de-icing salts. The given solution is to bypass the artificial wetland in wintertime to avoid metal flush out. This research strives to deepen the insight into metal mobilisation in artificial wetlands under the influence of de-icing salts. The main question of this research is worded: “What is the influence of de-icing salts on the remobilization of heavy metals in an artificial wetland?” For this research six artificial wetlands located at traffic junction Raasdorp, A5 and A9, are available for measurements. Visual inspection reduced this amount to one due to various deficiencies in the other five. This resulted in a sub question: Does the filter function hydraulically as it is designed for? By use of a water balance, visual inspection and gathered data by use of divers an indication of the hydraulic functioning is made. Since high iron concentrations were measured it is concluded that groundwater is leaking into the artificial wetland. The other option, iron is leaching out of the filter substrate, is rejected by the column test results. Here the iron concentrations are decreasing which should not be the case if it is originating from the substrate. Artificial wetlands are characterised by enhancement of treatment performances because of the presence of vegetation. The main processes which are introduced by vegetation are summarized by the term phytoremediation. Vegetation is able to bind heavy metals in the root zone and also storing them into their biomass. To get insight into the heavy metal concentrations in several parts of the treatment facility water samples were took. The question in relation to the water samples is: “Do heavy metals and PAH occur in the influent of the artificial wetland and is there a difference with the effluent of the artificial wetland?”. Elevated levels for heavy metals were observed at the influent of sedimentation basin and artificial wetland. The highest concentrations were measured for copper and zinc. The other four measured heavy metals were: cadmium, chrome, nickel and lead. These metals did not show significant higher concentrations. In most cases here, the concentration was below the detection limits of the laboratory analysis.PAHs were also measured but in most cases the concentrations were below the detection limits of the laboratory analysis. Because of this less attention is paid to the behaviour of PAHs in comparison to heavy metals. The results of the measurements display a pattern where in… Advisors/Committee Members: Van de Giesen, N.C. (mentor).

Subjects/Keywords: artificial wetland; heavy metals; de-icing salt; remobilization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

De Koning, M. K. (. (2012). The influence of de-icing salts on the remobilization of heavy metals in an artificial wetland. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:3fb56858-db8a-4712-b337-01f218c81d5f

Chicago Manual of Style (16^th Edition):

De Koning, M K (author). “The influence of de-icing salts on the remobilization of heavy metals in an artificial wetland.” 2012. Masters Thesis, Delft University of Technology. Accessed March 03, 2021. http://resolver.tudelft.nl/uuid:3fb56858-db8a-4712-b337-01f218c81d5f.

MLA Handbook (7^th Edition):

De Koning, M K (author). “The influence of de-icing salts on the remobilization of heavy metals in an artificial wetland.” 2012. Web. 03 Mar 2021.

Vancouver:

De Koning MK(. The influence of de-icing salts on the remobilization of heavy metals in an artificial wetland. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Mar 03]. Available from: http://resolver.tudelft.nl/uuid:3fb56858-db8a-4712-b337-01f218c81d5f.

Council of Science Editors:

De Koning MK(. The influence of de-icing salts on the remobilization of heavy metals in an artificial wetland. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:3fb56858-db8a-4712-b337-01f218c81d5f

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