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Technical Brief

Effect of Thermal Barrier Coating and Gas Radiation on Film Cooling of a Corrugated Surface

[+] Author and Article Information
Kuldeep Singh

Research scholar, Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, Hauz Khas, New Delhi - 110016 India
kuldeepdagar@gmail.com

B. Premachandran

Associate Professor, Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, Hauz Khas, New Delhi - 110016 India
prem@mech.iitd.ac.in

M.R. Ravi

Professor, Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, Hauz Khas, New Delhi - 110016 India
ravimr@mech.iitd.ac.in

1Corresponding author.

ASME doi:10.1115/1.4039761 History: Received April 28, 2017; Revised March 20, 2018

Abstract

In the present work, a numerical study is conducted to investigate film cooling of a corrugated surface. A conjugate heat transfer analysis is carried out, accounting for the presence of thermal barrier coating (TBC) and gas radiation. The Mach number of mainstream flow is maintained at Ma = 0.6 while cold stream Mach number is varied from 0.3 to 0.58 and density ratio is kept 4. From this study, it is observed that the overall film cooling effectiveness increases by a value ranging from 0.10 to 0.15 with the use of TBC. The hot side metallic wall temperature increases in the range of 100°C to 150°C when the effect of gas radiation is considered. It is also found that film cooling effectiveness decreases with decrease in the cold side Mach number.

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