Computational and experimental investigations are reported on a flat plate subjected to combined impingement and film cooling with a (14 × 14) matrix of impingement holes and three (6 × 4) staggered arrays of 35° inclined film holes. Conjugate flow and thermal computations are carried out, by using shear stress transport (SST) κ-ω turbulence model. The combined thermo fluid dynamic features of impinging jets and the coolant-mainstream interactions in presence of impingement and film cooling plates are described. Local values of Nusselt number are presented on the impingement surface and film cooling effectiveness values are plotted along the interaction surface. The computed surface temperature distribution is validated by thermochromic liquid crystal measurements. A comparison between the film cooling and the combined impingement and film cooling shows that the surface effectiveness values for the combined cooling are higher as well as more uniform. As the blowing ratio is increased from M = 0.6 to 1.0, the local streamwise effectiveness values show an increasing trend for both the cases. The effectiveness values are higher for higher conducting material at all blowing ratios. However, in case of lower conducting material, local patches of higher effectiveness are observed close to the jet exit.
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ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
June 11–15, 2012
Copenhagen, Denmark
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4470-0
PROCEEDINGS PAPER
Conjugate Heat Transfer From a Flat Plate With Combined Impingement and Film Cooling
Rajesh Kumar Panda,
Rajesh Kumar Panda
Indian Institute of Technology, Madras, Chennai, TN, India
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B. V. S. S. S. Prasad
B. V. S. S. S. Prasad
Indian Institute of Technology, Madras, Chennai, TN, India
Search for other works by this author on:
Rajesh Kumar Panda
Indian Institute of Technology, Madras, Chennai, TN, India
B. V. S. S. S. Prasad
Indian Institute of Technology, Madras, Chennai, TN, India
Paper No:
GT2012-68830, pp. 347-356; 10 pages
Published Online:
July 9, 2013
Citation
Panda, RK, & Prasad, BVSSS. "Conjugate Heat Transfer From a Flat Plate With Combined Impingement and Film Cooling." Proceedings of the ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. Volume 4: Heat Transfer, Parts A and B. Copenhagen, Denmark. June 11–15, 2012. pp. 347-356. ASME. https://doi.org/10.1115/GT2012-68830
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