Numerical Investigation on Overall Cooling Effectiveness for a Combined Scheme of Slot Injection and Effusion Cooling

被引：0
|
作者：
Qu L.-H. [1 ]
Zhang J.-Z. [1 ,2 ]
Tan X.-M. [1 ]
机构：
[1] Nanjing University of Aeronautics and Astronautics, Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing
[2] Collaborative Innovation Center of Advanced Aero-Engine, Beijing
来源：
| 2018年 / Journal of Propulsion Technology卷 / 39期
关键词：
Combined cooling scheme; Effusion cooling; Numerical simulation; Overall cooling effectiveness; Slot injection;
D O I：
10.13675/j.cnki.tjjs.2018.04.016
中图分类号：
学科分类号：
摘要：
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.
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页码：849 / 856
页数：7
相关论文
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