Film Cooling Performance of a Row of Dual-fanned Holes at Various Injection Angles  

作　　者：LI Guangchao WANG Haofeng ZHANG Wei KOU Zhihai XU Rangshu 

机构地区：[1]Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang, China 110136

出　　处：《Journal of Thermal Science》2017年第5期453-458,共6页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51406124);by the Natural Science Foundation of Liaoning Province of China(Grant No.201602576)

摘　　要：Film cooling performance about a row of dual-fanned holes with injection angles of 30°, 60 ° and 90° were experimentally investigated at blowing ratios of 1.0 and 2.0. Dual-fanned hole is a novel shaped hole which has both inlet expansion and outlet expansion. A transient thermochromic liquid crystal technique was used to reveal the local values of film cooling effectiveness and heat transfer coefficient. The results show that injection angles have strong influence on the two dimensional distributions of film cooling effectiveness and heat transfer coefficient. For the small injection angle of 30 degree and small blowing ratio of 1.0, there is only a narrow spanwise region covered with film. The increase of injection angle and blowing ratio both leads to the enhanced spanwise film diffusion, but reduced local cooling ability far away from the hole. Injection angles have comprehensive influence on the averaged film cooling effectiveness for various x/d locations. As injection angles are 30 and 60 degree, two bands of high heat transfer coefficients are found in mixing region of the gas and coolant. As injection angle increases to 90 degree, the mixing leads to the enhanced heat transfer region near the film hole. The averaged heat transfer coefficient increases with the increase of injection angle.

关 键 词：gas turbine film cooling dual-fanned hole thermochromic liquid crystal technique 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]