实验流体力学2025，Vol.39Issue(1)：45-53,9.DOI:10.11729/syltlx20220041
内外流一体化气动热模拟一致性研究
The aerodynamic heating consistency study between CFD and experiment for air-breathing integrated vehicle
张旭辉 1王兆伟 2姚冉2
作者信息
- 1. 中国航天科技创新研究院,北京 100032
- 2. 中国运载火箭技术研究院,北京 100076
- 折叠
摘要
Abstract
In order to improve the accuracy of simulation and obtain the aerodynamic heating consistency of the prediction method for the typical integrated design of the aircraft forebody model,experiments were carried out at FD-20a shock tunnel under the condition of Ma∞=6,ReL=1.14×107～2.98×107 m-1,α=0°～8°.Numerical simulations were applied through the compressible Navier-Stokes equation implemented with the finite volume method,Roe's flux difference splitting scheme,LU-SGS spatial method and Spalart-Allmaras(SA)turbulence model.Simulation results were compared with the experimental data to validate the prediction methods.Results show that with the increase of the complexity and disturbance intensity,the heat flux consistency decreases.The compression surface flow was dominated by the attached flow and small separation,where relative good consistency was found between the simulation and experimental data with the average difference being about 22.3%.The throat boundary layer was interfered by shock waves,and 43.5%difference was found between the heat flux simulation and experimental data.The heat flux difference in the isolation section increased to 31.8%.When the oblique shock impinged on the subsonic part of the bow shock and three dimensional flow patterns were obvious,the difference of heat flux reached the maximum of around 100%in three dimensional areas.Mesh,simulation methods and unsteady characteristics are concluded as the reasons for heat flux consistency decreasing along the airflow.关键词
内外流一体化/气动热/激波风洞/数值仿真/一致性Key words
internal and external integrated flow/aerodynamic heating prediction/shock wave tunnel/numerical simulation/consistency分类
航空航天引用本文复制引用
张旭辉,王兆伟,姚冉..内外流一体化气动热模拟一致性研究[J].实验流体力学,2025,39(1):45-53,9.
