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Affiliation of Author(s):能源与动力学院

Journal:Tuijin Jishu

Abstract:Numerical simulation is carried out to study the overall cooling effectiveness for a combined scheme of slot injection and effusion cooling where the slot outlet is located upstream the effusion holes-array. The comparison between combined cooling scheme and pure effusion cooling scheme is made under the same coolant usage. The results show that the combined scheme of slot injection and effusion cooling improves significantly the overall cooling effectiveness in the front zone of effusion holes-array. There is an increase of 12%~16% in the averaged cooling effectiveness. This combined cooling scheme makes the blowing ratio of the effusion cooling part less than the correspondingly pure effusion cooling scheme due to the exist of slot injection, resulting in a little decrease of the overall cooling effectiveness in the rear zone of effusion holes-array in relative to pure effusion cooling under low blowing ratios. However, under high blowing ratios, the overall cooling effectiveness for a combined scheme is nearly the same as the pure effusion cooling scheme in the rear zone of effusion holes-array. As the increase of slot height, the overall cooling effectiveness is enhanced in the front zone while reduced a little in the rear zone of effusion holes-array. © 2018, Editorial Department of Journal of Propulsion Technology. All right reserved.

ISSN No.:1001-4055

Translation or Not:no

Date of Publication:2018-04-01

Co-author:Qu, Li-Hong,TAN Xiaoming

Correspondence Author:zjz