空气动力学学报2025，Vol.43Issue(12)：81-89,9.DOI:10.7638/kqdlxxb-2024.0105
氢气驱动激波风洞高焓流场建立过程的数值模拟研究
Numerical simulation on formation process of high-enthalpy flow fields in hydrogen-driven shock tunnels
摘要
Abstract
To comprehensively investigate the formation of high-enthalpy flow fields in hydrogen-driven shock tunnels,this study conducted an in-depth numerical simulation using an implicit algorithm with second-order spatial accuracy and dual-time stepping.The simulation covered the entire evolution from tunnel initiation to the establishment of a stable flow field at the nozzle exit.Results demonstrate that under initial conditions of 50 MPa hydrogen in the high-pressure section and 100 kPa air in the low-pressure section(both at 300 K),the double diaphragms ruptured at 8.54 ms.By 10.20 ms,the flow pressure at the nozzle inlet reached 29.8 MPa with a temperature of 3 500 K,and remained stable for 6.80 ms.The shock wave evolution in the throat region exhibited a characteristic sequence:incident shock;oblique shock;shock train;bow shock;lambda shock.In the downstream nozzle section,a primary shock wave formed fint,followed by a secondary shock.These two shocks propagated cooperatively downstream,ultimately establishing a stable flow field at 13.00 ms,which persisted for 2.00 ms.The stabilized flow field exhibited a core region with a Mach number of about 9.1,static pressure of about 900 kPa,and static temperature of about 260 K,while a uniform flow zone with a diameter of approximately 840 mm was achieved at the nozzle exit.This research enhances the fundamental understanding of high-enthalpy flow dynamics in shock tunnels and provides critical insights for optimizing ground-based hypersonic testing facilities to meet the demands of advanced aerospace vehicle development.关键词
氢气驱动/激波风洞/高焓流场/数值模拟/激波Key words
hydrogen-driven/shock tunnel/high-enthalpy flow field/numerical simulation/shock wave分类
航空航天引用本文复制引用
吴轩宇,孔小平,慎志豪,胥海伦..氢气驱动激波风洞高焓流场建立过程的数值模拟研究[J].空气动力学学报,2025,43(12):81-89,9.基金项目
激波风洞实验技术研究项目(省部级项目) （省部级项目）
