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Title: Transpiration cooling using air as a coolant

Abstract

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.

Authors:
; ; ;  [1]
  1. Doshisha Univ., Kyoto (Japan)
Publication Date:
OSTI Identifier:
6339719
Resource Type:
Journal Article
Journal Name:
Heat Transfer - Japanese Research; (United States)
Additional Journal Information:
Journal Volume: 21:4; Journal ID: ISSN 0096-0802
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Kikkawa, Shinzo, Senda, Mamoru, Sakagushi, Katsuji, and Shibutani, Hideki. Transpiration cooling using air as a coolant. United States: N. p., 1993. Web.
Kikkawa, Shinzo, Senda, Mamoru, Sakagushi, Katsuji, & Shibutani, Hideki. Transpiration cooling using air as a coolant. United States.
Kikkawa, Shinzo, Senda, Mamoru, Sakagushi, Katsuji, and Shibutani, Hideki. 1993. "Transpiration cooling using air as a coolant". United States.
@article{osti_6339719,
title = {Transpiration cooling using air as a coolant},
author = {Kikkawa, Shinzo and Senda, Mamoru and Sakagushi, Katsuji and Shibutani, Hideki},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6339719}, journal = {Heat Transfer - Japanese Research; (United States)},
issn = {0096-0802},
number = ,
volume = 21:4,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 1993},
month = {Mon Feb 01 00:00:00 EST 1993}
}