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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/17786
Title: LCT and PIV investigations behind trapezoidal-rib with a slit mounted on bottom wall of a rectangular duct
Authors: Ali M.S.
Tariq A.
Gandhi B.K.
Published in: Proceedings of ASME 2012 Gas Turbine India Conference, GTINDIA 2012
Abstract: Various rib turbulator geometries have been used earlier to investigate the heat transfer and fluid flow characteristics owing to its vast industrial applications. Permeable ribs are reported to provide better performance in terms of heat transfer enhancement and pressure penalty. The trapezoidal rib with variable downstream chamfering and a centrally placed longitudinal slit has been used for the detailed flow field and heat transfer investigations using particle image velocimetry and liquid crystal thermography. Objective of the present work is to study the combined effect of rib chamfering along with a continuous slit and establish an understanding of the underlying flow mechanism and the corresponding heat transfer distribution. Experiments were carried out for hydraulic diameter based Reynolds numbers of 61480 in a rectangular duct for flow over rib with 12.5% blockage ratio and 25% open area ratio. The chamfer angles were varied from 0 to 20 degree. It has been observed that the slitted rib cause shorter reattachment length and reduced pressure penalty as compared to its solid counterpart. Copyright © 2012 by ASME.
Citation: Proceedings of ASME 2012 Gas Turbine India Conference, GTINDIA 2012, (2012), 313- 325. Mumbai, Maharashtra
URI: https://doi.org/10.1115/GTINDIA2012-9689
http://repository.iitr.ac.in/handle/123456789/17786
Issue Date: 2012
Keywords: Better performance
Heat transfer and fluid flow
Heat transfer distributions
Heat Transfer enhancement
Hydraulic diameter
Liquid crystal thermography
Particle image velocimetries
Reattachment length
Gas turbines
Heat transfer
Industrial applications
Liquid crystals
Reynolds number
Turbulent flow
Ducts
ISBN: 9.78E+12
Author Scopus IDs: 55654866000
57119258700
7006087147
Author Affiliations: Ali, M.S., Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Roorkee-247667, India
Tariq, A., Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Roorkee-247667, India
Gandhi, B.K., Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Roorkee-247667, India
Corresponding Author: Tariq, A.; Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Roorkee-247667, India; email: tariqfme@iitr.ernet.in
Appears in Collections:Conference Publications [ME]

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