Influence Of Various Pin Fin Configurations On Trailing Edge Film Cooling

The film cooling is a kind of mode of simple and cooling effectiveness very high, it has been extensively adopted in the aviation turbine engine slice. This paper designed five various internal structure kinds of pin-fins (circular, ellipse, dripⅠ, dripⅡand dripⅢ) to study the film cooling disciplinarian, with measure of experiment and numerical simulation imitate .So this paper studied the influence with internal structure with different pin-fin on slot film cooling of cut-back tail. Result of the research as follows:(1) With the same race type and the same pin fin arrays types of the trailing edge cut-back of gas turbine, under the same blowing ratios: For the same film slot configurations, the cooling effectiveness and heat transfer coefficient increased with blowing ratios increased when M<1.63. But when the blowing ratio M≥1.63,the increase of heat transfer coefficient appeared alternative phenomenon with blowing ratio of the increment.(2) For the same film slot configurations and blowing ratios, the drip type configurations have the higher film cooling effectiveness than that of the circle and ellipse type configurations.(3) The influence of rib rows on heat transfer coefficient and film cooling effectiveness is smaller, the heat transfer coefficient and film cooling effectiveness of four rows configurations are better than that of five rows configurations under the same film slot configurations and blowing ratios.