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분사각도변화에 따른 단일 막냉각홀 주위에서의 열/물질전달 및 막냉각효율 특성
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 Title & Authors
분사각도변화에 따른 단일 막냉각홀 주위에서의 열/물질전달 및 막냉각효율 특성
이동호; 김병기; 조형희;
 
 Abstract
The present study investigates local heat transfer coefficients and film cooling effectiveness around a film cooling hole with compound angle orientations entering a cross flow. The film cooling je t is injected through a single hole inclined at 30° to the surface and laterally from 0° to 90° for the blowing rates of 0.5, 1.0 and 2.0. The naphthalene sublimation technique has been employed to determine both local heat/mass transfer coefficients and local adiabatic wall (impermeable wall) film cooling effectiveness near the injection hole. The two parameters are obtained from separate tests using pure air and naphthalene saturated air injections. The results indicate that the injected jet protects the surface effectively at low blowing rates and spreads more widely with the compound angle injections than with the axial injection. However, the film cooling effectiveness is low and the surface area protected by the injected jet is narrow at the high blowing rate.
 Keywords
Film Cooling;Naphthalene Sublimation Technique;Heat/Mass Transfer Analogy;Compound Angle Injection;Impermeable Adiabatic Wan Effectiveness;
 Language
Korean
 Cited by
 References
1.
ASME J. of Turbomachinery, 1994. vol.116. pp.106-112

2.
ASME J. of Turbomachinery, 1997. vol.119. pp.310-319

3.
ASME Paper No. 97-GT-269, 1997.

4.
ASME Paper No. 97-GT-270, 1997.

5.
ASME J. of Turbomachinery, 1995. vol.117. pp.440-450

6.
ASME J. of Turbomachinery, 1995. vol.117. pp.451-460

7.
10th Symposium on Transport Phenomena in Thermal Science and Process Engineering, 1997. vol.1. pp.203-208

8.
ASME Paper No. 67-Wa/GT-1, 1967.

9.
NASA CR-2642, 1976.

10.
J. Chem Thermodynamics, 1975. vol.7. pp.1173-1176

11.
Experimental Thermal and Fluid Science, 1995. vol.10. pp.416-434

12.
Mech. Engineering, 1953. vol.75. pp.3-8

13.
대낳기계학회논문집(B), 1997. vol.21. 7, pp.849-861

14.
ASME J. of Engineering for Power, 1968. vol.90. pp.384-395