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You searched for subject:(Thermal fields measurement). Showing records 1 – 3 of 3 total matches.

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RMIT University

1. Clarke, R. High-conductance measurement with the heat flow meter apparatus.

Degree: 2017, RMIT University

Measurement laboratories must be mindful of equipment limitations and increasing uncertainty as the extremes of operational range are approached. For thermal insulation measurement, the prominent issue with more highly-conductive materials is that of interface resistance. Equipment is generally based on the heat flow meter or the guarded hot apparatus, both of which measure the heat flow between flat parallel plates held at different temperatures with the test specimen located between them. Interface resistance occurs between the test specimen and the plates that it contacts. Standards prescribe lower limits of specimen thermal resistance, typically 0.1 m2.K/W. However whilst interface resistance may already be significant at this thermal resistance, measurement is often sought for more-conductive products. This dissertation considers a number of aspects of such measurements, in all cases proposing the use of flexible buffer materials at the interface between the test specimen and the apparatus plates in order to provide lower interface resistance. The use of this solution is seldom reported although it is described in some standards where it is also suggested that buffers of very low thermal resistance are required in order to minimize errors. However this would require them to be very thin and potentially ineffective. An alternative prospect has been explored, that of using thicker, softer interface materials to ensure good specimen contact. Separate measurement of the interface materials, in conjunction with an error analysis allows thermal resistance to be calculated as the difference between these measurements with known uncertainty. Chapter 2 describes a study using the difference approach to measure twelve highly-conducting specimens in conjunction with four foamed plastic buffer materials, based on PVC, silicone, EVA and nitrile. The specimens ranged from aluminium sheet to fluted plastic board. Compared with direct measurement, thermal resistance values via difference measurement were lower by between 0.003 and 0.01 m2.K/W, depending on specimen and buffer choice. Silicone sponge gave the most uniform results. Compression tests showed that it also displayed the lowest deformation hysteresis. An analysis of the difference calculation is given, showing it to be numerically inexact since there are residual interface-resistance terms that are not present in both measurement cases. Chapter 3 describes a further study of the difference technique in conjunction with flexible buffer materials, extending the procedure to materials of higher thermal resistance and to thinner, harder buffers. An alternative difference calculation is proposed to eliminate residual resistance terms through comparing results for the unknown specimen and for a reference specimen with similar surface characteristics and known properties, measured using the same buffers. Specimens of expanded polystyrene board and cast acrylic sheet were measured in the heat flow meter apparatus using two alternative silicone-based buffer materials, one…

Subjects/Keywords: Fields of Research; Thermal resistance; Thermal contact resistance; Thermal interface resistance; Thermal insulation measurement; Heat flow meter apparatus; Thermal test method; Thermal modelling

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

APA (6th Edition):

Clarke, R. (2017). High-conductance measurement with the heat flow meter apparatus. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162042

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

Chicago Manual of Style (16th Edition):

Clarke, R. “High-conductance measurement with the heat flow meter apparatus.” 2017. Thesis, RMIT University. Accessed December 09, 2019. http://researchbank.rmit.edu.au/view/rmit:162042.

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

MLA Handbook (7th Edition):

Clarke, R. “High-conductance measurement with the heat flow meter apparatus.” 2017. Web. 09 Dec 2019.

Vancouver:

Clarke R. High-conductance measurement with the heat flow meter apparatus. [Internet] [Thesis]. RMIT University; 2017. [cited 2019 Dec 09]. Available from: http://researchbank.rmit.edu.au/view/rmit:162042.

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

Council of Science Editors:

Clarke R. High-conductance measurement with the heat flow meter apparatus. [Thesis]. RMIT University; 2017. Available from: http://researchbank.rmit.edu.au/view/rmit:162042

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


INP Toulouse

2. Lagarde, Quentin. Caractérisation des perturbations d'usinage vers une optimisation du procédé et la mise en oeuvre d'une surveillance de l'usure d'outil dans le cas du TA6V : Machining disturbances characterization to process optimization and tool wear monitoring system for TA6V alloy to process optimization and tool wear monitoring system for TA6V alloy.

Degree: Docteur es, Génie Mécanique, Mécanique des Matériaux, 2019, INP Toulouse

Les travaux présentés dans cette thèse s'inscrivent un contexte d'amélioration de la productivité des pièces en TA6V. La maîtrise de l'usinage de cet alliage constitue un enjeu majeur pour les sous-traitants comme l'entreprise SOFOP qui doivent suivre les montées en cadence des principaux programmes aéronautiques. La première partie, basée sur un état de l'art académique, s'attache à identifier différents critères d'usinabilité du matériau au travers de plusieurs échelles. Dans un second temps, la démarche du Couple Outil-Matière (COM) est mise en œuvre sur deux outils utilisés par l'industriel afin de déterminer un espace de fonctionnement des conditions opératoires garantissant une amélioration de la productivité. La confrontation entre les résultats de la campagne expérimentale du COM et de l'application en contexte industriel a permis de souligner le fort impact de la stratégie d'usinage sur la durée de vie de l'outil de coupe. L'influence sur les mécanismes d'usure de la vitesse de coupe, souvent utilisée comme paramètre d'ajustement de la durée de vie en production, ainsi que de l'engagement radial de l'outil inhérent au parcours a été investiguée au travers d'un dispositif expérimental spécialement équipé d'une caméra thermique. Les liens entre les champs de températures et l'usure de l'outil de coupe ont ensuite été établis par des analyses MEB et EDX. L'étude phénoménologique ne permettant pas de pondérer l'impact des parcours d'usinage sur la durée de vie de l'outil de coupe, une approche statistique a alors été adoptée. Basée sur la récolte de la puissance de coupe en usinage, les corrélations établies entre les caractéristiques des signaux et la durée de vie de l'outil ont abouti à la proposition d'une modélisation expérimentale, fiabilisée vers de deux applications industrielles : une méthode de prédiction en amont de la production et une approche de surveillance de l'étatd'usure de l'outil en usinage

The work presented in this thesis aims at improving productivity when manufacturing TA6V parts. Knowledge and control of the milling process for this titanium alloy are a key challenge particularly for medium size companies like SOFOP who try to answer the increasing aeronautical parts market demand. The first section is focused on machinability criteria which are discussed through several scales. Then, following the couple tool-material method, working zones of two tools are determined in order to achieve productivity improvements. This results, obtained through laboratory tests have been faced with their industrial application and showed the strong links between milling paths and tool life. Influence of cutting speed and radial engagement has been investigated with a specifically developed experimental bench, equipped with a thermal camera. Indeed, the rst parameter is often considered as an adjustment variable for tool life during the validation phase and the other one is deeply linked with tool path. Temperature fields and tool wear have been correlated thanks to SEM and EDX images. Given the fact…

Advisors/Committee Members: Dessein, Gilles (thesis director), Wagner, Vincent (thesis director).

Subjects/Keywords: Mesure de champs thermiques; Puissance de coupe; Data Mining (DM); Usure outil; Prédiction; Surveillance; Thermal fields measurement; Cutting power; Data Mining (DM); Tool wear; Prediction; Monitoring

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

APA (6th Edition):

Lagarde, Q. (2019). Caractérisation des perturbations d'usinage vers une optimisation du procédé et la mise en oeuvre d'une surveillance de l'usure d'outil dans le cas du TA6V : Machining disturbances characterization to process optimization and tool wear monitoring system for TA6V alloy to process optimization and tool wear monitoring system for TA6V alloy. (Doctoral Dissertation). INP Toulouse. Retrieved from http://www.theses.fr/2019INPT0003

Chicago Manual of Style (16th Edition):

Lagarde, Quentin. “Caractérisation des perturbations d'usinage vers une optimisation du procédé et la mise en oeuvre d'une surveillance de l'usure d'outil dans le cas du TA6V : Machining disturbances characterization to process optimization and tool wear monitoring system for TA6V alloy to process optimization and tool wear monitoring system for TA6V alloy.” 2019. Doctoral Dissertation, INP Toulouse. Accessed December 09, 2019. http://www.theses.fr/2019INPT0003.

MLA Handbook (7th Edition):

Lagarde, Quentin. “Caractérisation des perturbations d'usinage vers une optimisation du procédé et la mise en oeuvre d'une surveillance de l'usure d'outil dans le cas du TA6V : Machining disturbances characterization to process optimization and tool wear monitoring system for TA6V alloy to process optimization and tool wear monitoring system for TA6V alloy.” 2019. Web. 09 Dec 2019.

Vancouver:

Lagarde Q. Caractérisation des perturbations d'usinage vers une optimisation du procédé et la mise en oeuvre d'une surveillance de l'usure d'outil dans le cas du TA6V : Machining disturbances characterization to process optimization and tool wear monitoring system for TA6V alloy to process optimization and tool wear monitoring system for TA6V alloy. [Internet] [Doctoral dissertation]. INP Toulouse; 2019. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2019INPT0003.

Council of Science Editors:

Lagarde Q. Caractérisation des perturbations d'usinage vers une optimisation du procédé et la mise en oeuvre d'une surveillance de l'usure d'outil dans le cas du TA6V : Machining disturbances characterization to process optimization and tool wear monitoring system for TA6V alloy to process optimization and tool wear monitoring system for TA6V alloy. [Doctoral Dissertation]. INP Toulouse; 2019. Available from: http://www.theses.fr/2019INPT0003


Brno University of Technology

3. Haratek, Jiří. Výpočet rozložení teplotního pole v elektrickém stroji .

Degree: 2017, Brno University of Technology

Tato diplomová práce pojednává o způsobech sloužících ke zjištění rozložení teplotního pole v elektrickém stroji. Teoretická část se věnuje metodám měření teploty ale také vzniku a přenosu tepelné energie v elektrickém stroji, konkrétně asynchronním motoru. Vedle klasických metod výpočtu oteplení se práce zabývá tepelnou analýzou motoru použitím metody konečných prvků v programu ANSYS Workbench. V závěru práce je rozvedena vhodnost použití jednotlivých metod v porovnání s měřením oteplovací zkoušky reálného asynchronního motoru.; This diploma thesis deals with methods used to determine the temperature field distribution within an electric machine. The first part is focused on methods of temperature measurement, generation and transfer of the thermal energy within the electric machine, asynchronous motor in particular. The thesis describes classical methods of temperature measurement and it also deals with ANSYS Workbench finite element method for thermal analysis of the motor. The final part of the thesis is focused on a comparation of all discussed methods with respect to results of thermal test for real asynchronous motor and concludes the most proper method. Advisors/Committee Members: Janda, Marcel (advisor).

Subjects/Keywords: Měření teploty; Oteplovací zkouška; Asynchronní motor; Metoda konečných prvků; ANSYS Workbench; Výpočet teplených sítí; Teplotní pole; Ztráty elektrického stroje; Temperature Measurement; Heat Examination; Asynchronous Motor; Finite Element Method; ANSYS Workbench; Calculation of Thermal networks; Temperature Fields; Losses of Electrical Machine

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Haratek, J. (2017). Výpočet rozložení teplotního pole v elektrickém stroji . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/66717

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

Chicago Manual of Style (16th Edition):

Haratek, Jiří. “Výpočet rozložení teplotního pole v elektrickém stroji .” 2017. Thesis, Brno University of Technology. Accessed December 09, 2019. http://hdl.handle.net/11012/66717.

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

MLA Handbook (7th Edition):

Haratek, Jiří. “Výpočet rozložení teplotního pole v elektrickém stroji .” 2017. Web. 09 Dec 2019.

Vancouver:

Haratek J. Výpočet rozložení teplotního pole v elektrickém stroji . [Internet] [Thesis]. Brno University of Technology; 2017. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/11012/66717.

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

Council of Science Editors:

Haratek J. Výpočet rozložení teplotního pole v elektrickém stroji . [Thesis]. Brno University of Technology; 2017. Available from: http://hdl.handle.net/11012/66717

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

.