Influence of repeated ribs on the thermal performance for flow in a heated duct of variable aspect ratio

K. Kant, Adnan Qayoum, Rajat Gupta

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

An experimental and numerical investigation for studying the effect of duct aspect ratio on heat transfer and friction characteristics is reported. Heat transfer experiments as well as pressure drop measurements are carried out to get detailed local heat transfer coefficient distributions and friction factor data for air-cooled ducts with 900 angled ribs. Numerical simulation is carried by adopting the k- turbulence model. Four different duct aspect ratios (AR) are studied: AR = 1, 1.33, 2 and 4, and the corresponding hydraulic diameter (D) and the rib height-to-hydraulic diameter ratio (e/D) are 0.2 m, 0.17 m, 0.13 m, 0.08 m and 0.05, 0.06, 0.075 0.125 respectively. The rib pitch-to-rib height ratio (p/e) is 10. The Reynolds Number is varied from 3,000 to 30,000. Both the experimental and numerical results show the similar trend on heat transfer and friction loss. The overall heat transfer coefficient increases with increasing duct aspect ratio. The highest heat transfer enhancement accompanied by the highest friction factor occurs at an aspect ration equal to 4.
Original languageEnglish
Title of host publicationProceedings of 5th International Conference on Fluid Mechanics and Fluid Power (FMFP 2014), At IIT KANPUR
Publication statusPublished - Dec 2014
Externally publishedYes
Event5th International Conference on Fluid Mechanics and Fluid Power (FMFP 2014) - Kanpur, India
Duration: 12 Dec 201414 Dec 2014
Conference number: 5

Conference

Conference5th International Conference on Fluid Mechanics and Fluid Power (FMFP 2014)
Abbreviated titleFMFP 2014
CountryIndia
CityKanpur
Period12/12/1414/12/14

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    Kant, K., Qayoum, A., & Gupta, R. (2014). Influence of repeated ribs on the thermal performance for flow in a heated duct of variable aspect ratio. In Proceedings of 5th International Conference on Fluid Mechanics and Fluid Power (FMFP 2014), At IIT KANPUR