Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(Rectangular fin). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Anna University

1. Tamil Selvam P. Studies on condensation over horizontal integral finned tubes.

Degree: Mechanical Engineering, 2011, Anna University

Horizontal Integral-fin (HIF) tubes having two-dimensional (2D) rectangular or trapezoidal circumferential fins are commonly used in horizontal surface condensers, to enhance the shell side condensation heat transfer. Based on the literature survey, the present research program has been carried out with the following objectives: To develop a simple and easy to use correlation to find the condensing-side heat transfer coefficient during condensation of vapour over single HIF tubes. To study the prediction capability of the developed model for CFCs (chlorofluorocarbon), water and HCFC / HFC (hydrochlorofluorocarbon / hydrofluorocarbon) refrigerants. To develop a better technique for reducing the condensate flooding at the bottom of the HIF tubes (especially for a high surface tension fluid like water) as the condensate retention adversely affects the condensation heat transfer performance. To study the different flow patterns under various conditions to reduce the condensate inundation effects. The following are the major conclusions observed from the above studies: A simple empirical model with four non-dimensional equations and seven empirical constants has been developed for predicting the heat transfer performance during condensation of vapour on single HIF copper tubes with rectangular or trapezoidal fins. In addition, it is evident that by properly placing the circumferential drainage rings at strategic locations, it is possible to control the condensate drainage pattern, by which the condensate inundation effects could be minimized significantly in practical condensers. In case of bank of tubes, this technique can be extended to control the location of condensate drainage. It will leave the other regions of the tubes at the bottom rows unaffected and these regions of the tubes will function as the top row tubes without any condensate inundation effects. This will increase the overall heat transfer rate.

References p. 138-149

Advisors/Committee Members: Srinivasan, P S S.

Subjects/Keywords: Horizontal Integral-fin tubes; Two dimensional rectangular

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

P, T. S. (2011). Studies on condensation over horizontal integral finned tubes. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/11713

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):

P, Tamil Selvam. “Studies on condensation over horizontal integral finned tubes.” 2011. Thesis, Anna University. Accessed July 11, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/11713.

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

MLA Handbook (7th Edition):

P, Tamil Selvam. “Studies on condensation over horizontal integral finned tubes.” 2011. Web. 11 Jul 2020.

Vancouver:

P TS. Studies on condensation over horizontal integral finned tubes. [Internet] [Thesis]. Anna University; 2011. [cited 2020 Jul 11]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11713.

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

Council of Science Editors:

P TS. Studies on condensation over horizontal integral finned tubes. [Thesis]. Anna University; 2011. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11713

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

2. Didarul, Islam Md. Study on Heat Transfer and Fluid Flow Characteristics of Rectangular Finned Surface in Duct : フィン付き流路内の流動・熱伝達特性に関する研究.

Degree: University of the Ryukyus / 琉球大学

学位の種類(博士(工学)),学位授与機関(琉球大学),授与年月日(平成19年9月14日),学位記番号(理工研第120号),報告番号(甲理工研第120号)

A detailed experimental investigation of the heat transfer and fluid flow characteristics of rectangular finned surfaces of four different fin patterns, co-angular, zigzag, co-rotating and co-counter rotating was conducted for an airflow (Re = 15700 - 104500) in a duct. Short rectangular fins of either aluminum or resin material were attached in 7 x 7 arrays to a heating surface (base plate) of constant heat flux by double sided thin tape. T-type thermocouples and an infrared camera (TVS 8000) with a 160 x 120 point In-Sb sensor were used to capture the infrared images as well as to measure the temperature and the detailed heat transfer at the endwall along with fin base. Different flow visualization technique, fluorescence dye flow in water channel, smoke flow visualization and oil titanium oxide film flow visualization were used to analysis the flow behavior and its effect on heat transfer. In this study we have first investigated the heat transfer and fluid flow characteristics of co-angular and zigzag fin pattern at a flat plate (200 mm duct height) boundary layer and narrow duct of 20 mm height. Zigzag pattern were found to be more effective in heat transfer at both flat plate and narrow duct case. In case of co-angular pattern dye flow stagnated in front of the fin and formed a strong horseshoe vortex around the fin while the longitudinal vortexes generated by the side top edges touched the fin surface and the endwall. On the other hand in case of zigzag pattern a weak horseshoe vortex appeared and longitudinal vortex struck the endwall mainly and a sinusoidal wavy flow behavior was observed. We have then further investigated heat transfer and flow characteristics of co-rotating pattern and co-counter rotating pattern along with other two pattern at a duct of 50 mm height. The heat transfer result shows that the co-rotating pattern has the highest Nusselt number and the co-angular pattern has the least Nusselt number. Considering the thermal performance, co-rotating pattern with smaller pitch ratio was found to be the most recommended pattern as the heat transfer augmentation with co-rotating pattern is more than three times the fin-less duct. Horseshoe vortex, main longitudinal vortex and rolled up vortex were again confirmed by smoke flow and oil titanium flow visualization. Among the four patterns largest friction factor occurred for the co-rotating pattern at smaller pitch ratio owing to the strong flow interactions and combined vortex attack on the endwall and fin surface whereas the least friction developed for co-angular pattern. Finally the effects of duct height on heat transfer and flow characteristics were investigated and the most important information about vortex structures at several streamwise positions was obtained which shows the reasons of heat transfer enhancement. Vortex structures for co-angular and co-rotating pattern were found different and the reattachment positions were obtained. Comparatively large scale…

Subjects/Keywords: Convective heat transfer; Heat transfer enhancement; Rectangular fin; Longitudinal vortex; Horseshoe vortex; Infrared Image

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Didarul, I. M. (n.d.). Study on Heat Transfer and Fluid Flow Characteristics of Rectangular Finned Surface in Duct : フィン付き流路内の流動・熱伝達特性に関する研究. (Thesis). University of the Ryukyus / 琉球大学. Retrieved from http://hdl.handle.net/20.500.12000/5748

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Didarul, Islam Md. “Study on Heat Transfer and Fluid Flow Characteristics of Rectangular Finned Surface in Duct : フィン付き流路内の流動・熱伝達特性に関する研究.” Thesis, University of the Ryukyus / 琉球大学. Accessed July 11, 2020. http://hdl.handle.net/20.500.12000/5748.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Didarul, Islam Md. “Study on Heat Transfer and Fluid Flow Characteristics of Rectangular Finned Surface in Duct : フィン付き流路内の流動・熱伝達特性に関する研究.” Web. 11 Jul 2020.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Didarul IM. Study on Heat Transfer and Fluid Flow Characteristics of Rectangular Finned Surface in Duct : フィン付き流路内の流動・熱伝達特性に関する研究. [Internet] [Thesis]. University of the Ryukyus / 琉球大学; [cited 2020 Jul 11]. Available from: http://hdl.handle.net/20.500.12000/5748.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Didarul IM. Study on Heat Transfer and Fluid Flow Characteristics of Rectangular Finned Surface in Duct : フィン付き流路内の流動・熱伝達特性に関する研究. [Thesis]. University of the Ryukyus / 琉球大学; Available from: http://hdl.handle.net/20.500.12000/5748

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

.