Optimization of Hypersonic Rocket Sled Aerodynamic Characteristics and Wind Tunnel Tests

被引：1
|
作者：
Zhou X. [1 ]
Yan H. [2 ]
Lu S. [2 ]
Li K. [2 ]
机构：
[1] School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an
[2] Test and Measuring Academy of Norinco Group, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2024年 / 58卷 / 05期
关键词：
aerodynamic characteristics; aerodynamic shape; numerical analysis; rocket sled; wind tunnel test;
D O I：
10.7652/xjtuxb202405015
中图分类号：
学科分类号：
摘要：
To study how to improve the operational stability of a rocket sled on orbit under hypersonic conditions without using additional stabilizing devices, an optimization design of the aerodynamic characteristics of a hypersonic rocket sled is carried out based on numerical analysis methods, and the aerodynamic characteristics of the optimized sled are studied under different operating conditions through wind tunnel tests. Firstly, a numerical analysis method for the aerodynamic characteristics of rocket sleds based on SST turbulence model and N-S control equation is developed, and the accuracy of the calculation method is verified through the classical double ellipsoid model. Then, based on the numerical analysis method of aerodynamic characteristics, the aerodynamic shape design of the sled body is conducted, and elevation angle, lateral deviation angle of the rectifier board, and position of the front and rear slipper arc optimized. Finally, the aerodynamic characteristics of the optimized sled body under different operating conditions arc studied through wind tunnel tests, and the effects of Mach number, Reynolds number, and track and ground effects arc analyzed. The accuracy of the numerical analysis method for hypersonic aerodynamic characteristics of rocket sleds is about 86. 94%, which can be used to simulate the aerodynamic characteristics of rocket sleds in hypersonic flow fields. At Ma = 5, the optimized model reduces aerodynamic drag by 23. 57% and aerodynamic lift by 38. 49% compared to the pre-optimized model. As the Mach number increases, the drag coefficient of the sled body shows a decreasing trend, for example, when the Mach number increases from 4 to 6, the drag coefficient of the sled body decreases by 19. 98%. The lift coefficient and pitch moment coefficient of the sled body both increase with the increase of Reynolds number. At Ma = 5, when the Reynolds number changes from 1. 80 X 107 to 3. 60 X 107, the drag coefficient and pitch moment coefficient of the sled increase by 8. 95% and 13. 09% respectively. The track and ground will lead to a simultaneous increase in the resistance coefficient, lift coefficient, and pitch moment coefficient of the sled body, with the pitch moment coefficient changing the most significantly. The average increment of pitch moment coefficient in the three comparative experiments is about 992%. The research can provide data support for the design of hypersonic rocket sleds and has certain engineering application value. © 2024 Xi'an Jiaotong University. All rights reserved.
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页码：156 / 166
页数：10
相关论文
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