南京航空航天大学学报2024，Vol.56Issue(4)：609-621,13.DOI:10.16356/j.1005-2615.2024.04.003
高超声速带奇性轴外形热流准确预示的混合算法研究与应用
Research on Hybrid Algorithm for Accurate Heat Flux Prediction on Hypersonic Flows with Singularity Axis
谭国灼 1李沁 1黄潇 1翁谊辉 1严攀 1尤延铖1
作者信息
- 1. 厦门大学航空航天学院,厦门 361102
- 折叠
摘要
Abstract
Accurate heat flux prediction is a key problem in the numerical simulation of hypersonic flows.When the singularity axis appears in the grid,it further increases the difficulty of accurate flow simulation and heat flux calculation.Aiming at the problems of instability of flow structure and large errors of heat flux prediction in the finite difference calculation of singularity axis problems,a hybrid algorithm for solving the singularity axis problem with high-precision difference schemes is proposed by combining the flux reconstruction and conservation reconstruction.The algorithm is based on conservative variables reconstruction near the singularity axis,which can reflect the influence of the flow field distribution near the singularity axis.The algorithm can effectively solve the singularity axis problem in numerical simulation.Applying the hybrid algorithm with WENO3-JS and WENO3-PRM21,1 scheme,the numerical simulations of hypersonic flow around sphere,HB-2,sphere cone and Apollo are carried out.The results show that the new method can effectively solve the problems of flow instability with singularity axis,and can achieve accurate heat flux prediction.关键词
高超声速/气动热/奇性轴/混合算法/高精度格式Key words
hypersonic/aerodynamic heat/singularity axis/hybrid algorithm/high accuracy scheme分类
航空航天引用本文复制引用
谭国灼,李沁,黄潇,翁谊辉,严攀,尤延铖..高超声速带奇性轴外形热流准确预示的混合算法研究与应用[J].南京航空航天大学学报,2024,56(4):609-621,13.
