Transpiration cooling using air as a coolant

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Heat Transfer - Japanese Research; (United States)

OSTI ID:6339719

Kikkawa, Shinzo; Senda, Mamoru; Sakagushi, Katsuji; Shibutani, Hideki ^[1]

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1. Doshisha Univ., Kyoto (Japan)

Transpiration cooling is one of the most effective techniques for protecting a surface exposed to a high-temperature gas stream. In the present paper, the transpiration cooling effectiveness was measured under steady state. Air as a coolant was transpired from the surface of a porous plate exposed to hot gas stream, and the transpiration rate was varied in the range of 0.001 [approximately] 0.006. The transpiration cooling effectiveness was evaluated by measuring the temperature of the upper surface of the plate. Also, a theoretical study was performed and it was clarified that the effectiveness increases with increasing transpiration rate and heat-transfer coefficient of the upper surface. Further, the effectiveness was expressed as a function of the blowing parameter only. The agreement between the experimental results and theoretical ones was satisfactory.

• OSTI ID: 6339719
• Journal Information: Heat Transfer - Japanese Research; (United States), Vol. 21:4; ISSN 0096-0802
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
PLATES
GAS COOLING
POROUS MATERIALS
AIR
EXPERIMENTAL DATA
STEADY-STATE CONDITIONS
THERMAL EFFICIENCY
THERMODYNAMICS
WORKING FLUIDS
COOLING
DATA
EFFICIENCY
FLUIDS
GASES
INFORMATION
MATERIALS
NUMERICAL DATA
420400* - Engineering- Heat Transfer & Fluid Flow