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| Numerical and wind tunnel test research on aerodynamic characteristics of high-speed rocket sled under the influence of ground effect |
| Received:September 14, 2021 Revised:February 24, 2022 |
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| DOI：10.7511/jslx20210914001 |
| KeyWord:high-speed rocket sled wind tunnel test finite volume method Reynolds number effect ground effect |
| Author | Institution |
| 赵鹏刚 |
西安交通大学 机械结构强度与振动国家重点实验室, 西安 |
| 刘振 |
西安交通大学 机械结构强度与振动国家重点实验室, 西安 |
| 党天骄 |
西安交通大学 机械结构强度与振动国家重点实验室, 西安 |
| 孙亚川 |
西安交通大学 机械结构强度与振动国家重点实验室, 西安 |
| 孙也 |
西安交通大学 机械结构强度与振动国家重点实验室, 西安 |
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| Abstract: |
| Precisely predicting the aerodynamic characteristics and the flow field of a high-speed rocket sled under-ground effects is of great significance to the design and evaluation of the sled.The finite volume method was used to study the influence of turbulence model on the calculation accuracy of rocket sled aerodynamic characteristics,and a high-precision numerical method for the rocket sled aerodynamic characteristics based on the realizable k-ε turbulence model was established.In combination with the wind tunnel test,the influence of Reynolds number and ground effects on the flow field characteristics of a high-speed rocket sled was studied,and the aerodynamic characteristics of the sled were analyzed.The results showed that the drag coefficient decreased with the increasing Reynolds number,while the lift and pitching moment coefficients increased. However,the Reynolds number had little influence on the aerodynamic characteristics of the sled.Ground effects could induce the interference between shock waves,the interference between the shock wave and the boundary layer,the shock wave repeated reflection,and other complex aerodynamic phenomena in the flow field of the rocket sled,which significantly improved the lift and pitch moment coefficients,but had little influence on the drag coefficient.This study provided a basis for the design of the aerodynamic shape of a high-speed rocket sled and the evaluation of the stability. |
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