Analysis of flow entropy generation in aero-engine grate and construction of low entropy generation grate

被引：0
|
作者：
Liu X. [1 ,3 ]
Ding S. [2 ]
Qiu T. [3 ]
Liu C. [3 ]
Li G. [1 ]
Zhao Z. [4 ]
机构：
[1] School of Energy and Power Engineering, Beihang University, Beijing
[2] Civil Aviation University of China, Tianjin
[3] Research Institute of Aero-Engine, Beihang University, Beijing
[4] The Fourth Departments of Technical Research, Chinese Aeronautical Establishment, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 09期
关键词：
configuration; drag increasing vortex; entropy generation; grate; sealing performance;
D O I：
10.13224/j.cnki.jasp.20210730
中图分类号：
学科分类号：
摘要：
The numerical simulation method of grate entropy generation analysis was established, and the accuracy of the method was verified by tests. Then, the flow entropy generation mechanism and the main flow characteristics leading to entropy generation under the changes of inclination angle, tooth top width, tooth height and step height of stepped grate were revealed. On this basis, the grate was optimized and analyzed from the perspective of system entropy generation. The results showed that the relative dissipation intensity in the top region of the grate was large, resulting in strong drag increasing effect of the top vortex in this region, and contributing a lot to improving the local entropy generation of the grate and reducing the system entropy generation. The design goal of enhancing the local entropy generation of the grate and reducing the leakage can be achieved by actively constructing the tooth top vortex (drag increasing vortex); the sealing performance of the optimized stepped grate structure was 24% higher than that of the initial stepped teeth. © 2023 BUAA Press. All rights reserved.
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页码：2107 / 2115
页数：8
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