Numerical simulation of effect of parabolic nozzle contour parameters on flow separation

被引：0
|
作者：
Wang Y.-B. [1 ]
Liang Y.-J. [1 ]
Zhao Y.-H. [1 ]
Li B. [2 ]
Liu Y. [1 ]
机构：
[1] School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing
[2] Research and Development Center, First Research Institution, China Aerospace Science and Technology Corporation, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2017年 / 32卷 / 04期
关键词：
Contour parameter; Flow separation; Nozzle; Separation mode; Side load;
D O I：
10.13224/j.cnki.jasp.2017.04.022
中图分类号：
学科分类号：
摘要：
To investigate how the parabolic nozzle flow separation process is affected by three contour parameters, namely initial expansion curve radius, inlet angle and exit angle, the flow field parameters under different contour parameter combinations were numerically simulated, the changing processes of the nozzle flow separation position and separation mode with the increases of gas chamber pressure were obtained. The flow separation mode variation process with chamber pressure was gained. Results show that these three parameters can influence the development of nozzle flow field during engine starting, the flow separation mode transition nozzle pressure ratio (NPR) keeps a positive relationship with the initial expansion curve radius within a certain range. Restricted shock separation can be put off and shortened by suitable design of inlet angle and exit angle. The conclusion provides a possible way to solve the side load problem. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：955 / 960
页数：5
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