双模态冲压发动机进气道/隔离段流场的数值研究

Numerical Investigation on Inlet/Isolator Flow Field of a Dual-Mode Scramjet

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要: 进气道/隔离段装置是双模态冲压发动机的关键部件,在为发动机提供足够的空气流量的同时,还要有良好的起动特性和良好的出口流场品质。采用有限体积法,隐式的二阶TVD迎风格式和S-A湍流模型,对进气道/隔离段装置进行了数值研究,分析了不同收敛角以及不同外罩长度对进气道/隔离段性能的影响。研究结果表明隔离段进口在马赫数高,畸变小的情况下承受反压能力强,流场出口品质好。
- 航空、航天推进系统 /
- 双模态 /
- 进气道 /
- 隔离段 /
- 数值模拟
Abstract: Inlet and isolator are key components of the dual-mode scramjet.They should not only provide enough airflow to the engine,but also show preferable starting characteristics and supply airflow with good quality.In this paper,finite volume method and 2nd order TVD upwind scheme were exploited with S-A turbulence model to investigate the flow field in the inlet and isolator.The influence of inlet convergent angle and inlet cowl length on the performance of inlet and isolator was analyzed.The investigation indicates that isolator tend to resist higher back pressure and provide exit airflow with better quality under conditions of high mach number and low distortion.
- aerospace propulsion system /
- dual-mode /
- inlet /
- isolator /
- numerical simulation

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