三维弯曲流面法及其在外流乘波体中的应用

doi:10.7527/S1000-6893.2024.30492

Abstract

Abstract:

Using the most phenomenon of common shock wave in hypersonic flow for aerodynamic profile design is one of the important directions of aircraft research. To solve the three-dimensional curved shock flow field more accurately and efficiently， a new inverse design method， called the method of three-dimensional curved stream-surface， is proposed for the design of waverider. The new method discretizes the pre-given three-dimensional curved shock surface into multiple flow surfaces， and calculates the flow field in the curved flow surface according to the aerodynamic parameters of the stream-surface and their derivatives. In this way， the streamline in the calculation process is always in the curved stream-surface. Two shock waves with different three-dimensional characteristics are specified as input to prove the effectiveness of this method. The results show that the wall pressure ratio error is less than 1.07% in the conical flow field and the elliptic curved cone flow field compared with inviscid CFD results. At the same time， this method is applied to the design of waveriders for specified elliptic conical shock. The accuracy of this method for the design of waverider is verified by inviscid CFD simulation， with the maximum wall pressure ratio error being only 0.26% and the calculation time and resources being reduced by about 40% compared with the Local-Turning Osculating Cones Method under the same conditions. Therefore， the method of three-dimensional curved stream-surface can greatly improve the scope and efficiency of the waverider design， and is conducive to the design of the aerodynamic system of hypersonic vehicle.

Key words: three-dimensional curved shock wave, curved stream-surface, waverider, three-dimensional flow effect, hypersonic

CLC Number:

V211.3

Kai YANG, Mengfei ZHANG, Chongguang SHI, Yaokun YU, Xiaogang ZHENG, Chengxiang ZHU, Yancheng YOU. Method of three-dimensional curved stream-surface and its application in external waverider[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(2): 130492.

Figures/Tables 12

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References 25

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方法	C_L	C_D	升阻比
误差/%	0.074 5	0.023 5	0.050 9
MOTCS	0.218 5	0.074 3	2.941 9
CFD	0.218 7	0.074 3	2.943 4

方法	网格	压比最大误差/%	迭代步数	CPU时间/s
LTOCs	70×100	1.94	1 043 150	290
MOTCS	70×100	0.26	672 576	130

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Method of three-dimensional curved stream-surface and its application in external waverider

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