每年出版 18 期
ISSN 打印: 1064-2285
ISSN 在线: 2162-6561
Indexed in
FILM-COOLING CHARACTERISTICS OF UPSTREAM RAMP ENHANCED TURBINE BLADE SURFACE COOLING
摘要
Film cooling is widely used in high-performance gas turbines to reduce the surface heat flux. Placing a ramp upstream of a film-cooling hole improves the film-cooling effectiveness. In this work, the Reynolds-averaged Navier−Stokes equations with the k−ω SST model are solved to simulate heat transfer and fluid flow over an upstream ramp and two rows of injection holes. Three blowing ratios (M = 0.6, 1.0, and 1.6) and three upstream ramp angles (α = 0, 14° to 24°) are tested. It is found from the investigation that the film-cooling effectiveness increases with the upstream ramp angle and blowing ratio. Higher film-cooling effectiveness is noticed downstream of the second row holes than that of the upstream holes in the case without a ramp.
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Mansouri Zakaria, Numerical prediction of heat transfer characteristics on a turbine nozzle guide vane under various combustor exit hot‐streaks, Heat Transfer, 51, 1, 2022. Crossref
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Anand V. G. Krishna, Optimization of Significant Parameters for Ramp Film Cooling Using CFD-Integrated RSM Approach, in Advances in Thermal Sciences, 2023. Crossref