Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4990837 | Applied Thermal Engineering | 2018 | 9 Pages |
Abstract
This paper presents an experimental investigation of impinging-film cooling concerning the effects of various factors on overall cooling effectiveness η. The factors include blowing ratio M (0.31 â¤Â M â¤Â 1.84), non-dimensional jet-to-plate pitch Zn/d (1 â¤Â Zn/d â¤Â 2), non-dimensional spacing of jet holes Yn/d (1.6 â¤Â Yn/d â¤Â 2.4) and diameter of jet hole. The results show that overall cooling effectiveness invariably increases with a raise in blowing ratio. As non-dimensional jet-to-plate pitch increases, the cooling performs better. The decline of non-dimensional spacing of jet holes improves the overall cooling effectiveness at higher blowing ratios (M â¥Â 0.91), which was not observed in cases with low blowing ratios (M â¤Â 0.61). The variation of hole diameter (1.0-1.8 mm) has little influence on cooling performance.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Zhang Jingyu, Yuan Ce, Ji Pengfei, Wei Jieli, He Xiaomin,