Large Eddy Simulation on Field of Film Cooling with Different Shaped Jet Holes
Large Eddy Simulation was performed to investigate the development process of vortices in different sections of a round-shaped hole and a coneshaped hole with 30° under the condition of blowing rate M=1.0. The results show that the positive and negative vortices in the centre plane and the two wings of the horseshoe vortices in the vertical profiles were shed off new vortices alternately and periodically, the time of shed off of cone-shaped holes was less than the round-shaped holes at the some profile, the acting of jet and cross-flow was more acuity in the near wall, so carried off more energy-, then enhanced the film cooling effectiveness. The counterrotating vortex plays an important effect on the fields of film cooling. The counter-rotating vortex pair (CVP) of the round-shaped hole is bigger than the cone-shaped holes and the position of the roundshaped holes vortex center is higher than the cone-shaped holes in the same section. The cooling effectiveness of the round- shaped hole is in ferior to the cone-shaped holes.
film coolingt large eddy simulation flow field counter-rotating vortex pair
ZHANG Ling WEN Guo-liang
Institute for Energy and Power Engineering Northeast Dianli University, Jilin 132012, Jilin Province Institute for Energy and Power Engineering Northeast Dianli University. Jilin 132012, Jilin Province
国际会议
海口
英文
577-581
2011-07-15（万方平台首次上网日期，不代表论文的发表时间）