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Measurement of Film Cooling Effectiveness and Heat Transfer of Rectangular-Shaped Film Cooling Holes  

이윤석 (연세대학교 대학원 기계공학과)
이동호 (연세대학교 기계공학과)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.14, no.5, 2002 , pp. 365-376 More about this Journal
Abstract
An experimental study has been conducted to measure the local film-cooling effectiveness and the heat transfer coefficient for a single row of rectangular-shaped holes. four different cooling hole shapes such ai a straight rectangular hole, a rectangular hole with laterally expanded exit, a circular hole and a two-dimensional slot are tested. A technique using thermochromic liquid crystals determine adiabatic film cooling effectiveness values and heat transfer coefficients on the test surface. Both film cooling effectiveness and heat transfer coefficient are measured for various blowing rates and compared with the results of the cylindrical ho1es and the two-dimensional slot. The flow patterns downstream of holes are calculated numerically using a cummercial package. The results show that the rectangular hopes provide better peformance than the cylindrical holes. For the rectangular holes with expanded exit, the penetration is reduced significantly, and the higher and more uniform cooling Peformance is obtained even at relatively high blowing rates.
Keywords
film-cooling; rectangular-shaped holes; TLCtechnique;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Behavior of the Laterally Injected Jet in Film Cooling:Measurements of Surface Temperature and Velocity/Temperature Field within The Jet /
[ Honami S.;Shizawa T.;Uchiyama A. ] / J. of Turbomachinery
2 Film Cooling Downstream of a Row of Discrete Holes with Compound Angle /
[ Goldstein R.J.;Jin P. ] / J. of Turbomachinery
3 Effects of Orientation Angles on Film Cooling Over a Flat Plate: Boundary Layer Temperature Distributions and Adiabatic Film Cooling Effectiveness /
[ Jung I.S.;Lee J.S. ] / J. of Turbomachinery
4 Heat(Mass) Transfer for Flows around a Film Cooling Jet and a Circular Cylinder with Compound Angle Orientations /
[ Kim B.G.;Rhee D.H.;Cho, H.H. ] / Transport Phenomena in Thermal Science and Process Engineering
5 Effect of Hole Geometry and Density on Three-Dimensional Film Cooling /
[ Goldstein R.J.;Eckert E.R.G.;Burggraf F. ] / Int. J. Heat Mass Transfer