ТOM 94,   №5

SENSITIVITY ANALYSIS OF THE FILM-COOLING EFFECTIVENESS OF AN UPSTREAM CRESCENT-SHAPED VORTEX GENERATOR TO GEOMETRIC PARAMETERS



This study numerically investigates the flow field and cooling effectiveness of a cylindrical flat-plate film-cooling hole with an upstream crescent-shaped vortex generator (CSVG) at the blowing ratio 0.5 and 1.5. With the aid of a new antikidney-shaped vortex pair, this CSVG can markedly improve the cooling effectiveness in comparison to a cylindrical hole. The effects of five geometric parameters completely depicting the CSVG shape are investigated by the four-level and five-parameter Taguchi approach. It is shown that the ranking order of each geometric parameter is improved at both blowing ratios. The preliminary recommended upstream CSVGs with higher areaaveraged cooling effectiveness are given for both used ratios. 
 
Автор:  Zhang C., Bai L. C., Zhang P. F.
Ключевые слова:  film cooling, cylindrical hole, antikidney-shaped vortex pair, cooling effectiveness, Taguchi approach
Стр:  1161

Zhang C., Bai L. C., Zhang P. F..  SENSITIVITY ANALYSIS OF THE FILM-COOLING EFFECTIVENESS OF AN UPSTREAM CRESCENT-SHAPED VORTEX GENERATOR TO GEOMETRIC PARAMETERS // Инженерно-физический журнал. . ТOM 94, №5. С. 1161.


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