Affiliation:
1. National Committee for Heat and Mass Transfer of the Russian Academy of Sciences, 17A Krasnokazarmennaya, IVT Ran, Moscow 111250, Russia
Abstract
In the paper, a review of calculation methods and of experimental results for heat transfer under film cooling is presented. The effects of arrangement of film cooling, longitudinal pressure gradient, nonisothermality and compressibility of the gas, injection of a foreign gas, surface roughness, swirling of flow, and turbulent pulsations of the main gas flow on the effectiveness of film cooling are considered. A generalized correlation for the effectiveness of film cooling, is proposed, which makes it possible to take into account the influence of the above factors. It is shown, that in determination of the heat transfer coefficient in the region of film cooling, it is necessary to take into account the influence of injected gas on the development of the thermal boundary layer. A method of calculation for combined cooling (film, porous or transpiration and convective), which accounts for effect of longitudinal heat conductivity of the wall on the film cooling effectiveness is proposed. An estimation of profile losses on a gas turbine blade is given for the cases of film and porous or transpiration cooling.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference58 articles.
1. Andreev, K. D., Arseniev, L. V., and Polishchuk, V. G., et al., 1998, “Design of System of Cooling of Nozzle Vane of Gas Turbine for Driving GTI,” Heat Transfer 1998, Proceedings of 11th IHTC, Vol. 6, Taylor and Francis, London, pp. 481–490.
2. Baryshev, Yu. V., Vinogradov, Yu. A., Leontiev, A. I., et al., 1972, “Recovery Coefficients on a Permeable Surface and in the Region of Gas Film Cooling in the Supersonic Turbulent Boundary Layer,” Mechanika Zhidkosti i Gaza, pp. 131–136 (in Russian).
3. Baryshev
Yu. V.
, LeontievA. I., and PeikerN. K., 1976, “Turbulent Boundary Layer on a Permeable Surface with Intensive Blowing,” Inzhenerno-Fizichesky Zhurnal, Vol. 30, No. 5, pp. 773–779 (in Russian).
4. Bergles, G., Gosman, A., and Launder, B. E., 1977, “Near Field Character of a Jet Discharged through Wall at 30° to a Main Stream,” AIAA Journal, Vol. 15, No. 4.
5. Carlson
N. M.
, and TalmorE., 1968, “Gaseous Film Cooling at Various Degree of Hot-Gas Acceleration and Turbulence Levels,” Int. J. Heat and Mass Transfer, Vol. 11, No. 11, pp. 1695–1713.
Cited by
37 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献