The primary focus was to further understand the flow and heat transfer aspects of a special film cooling hole arrangement where the main film cooling hole was accompanied by two parallel anti-vortex jet holes. The cooling effectiveness and the interaction between the main hot stream and the coolant jets were simulated and compared with the standard single hole arrangement. It is found that the presence of anti-vortex jets decreased the size and the strength of the counter-rotating vortex pair of the main coolant jet and so is its mixing with the main hot stream. The surface film effectiveness value is improved as expected. A bigger diameter of anti-vortex holes means more obvious improvement of film cooling.
Liu Xiaohong, Luo Xiang, Tao Zhi.Effects of cylindrical hole accompanied with anti-vortex holes on film cooling effectiveness[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(11): 1271-1274
Zhang Yan.Experimental and numerical investigations on the vertical structures of an impinging jet in crossflow[D].Shanghai��Shanghai Institute of Applied Mathematics��Shanghai University and Mechanics��2005(in Chinese)