多体模型分离流动的典型气动干扰形式研究

Aero-Interference Typical Patterns for Multi-Bodies Spacious Separation Flow

关键词:  高速飞行器  激波/边界层干扰  多体模型空间分离  气动干扰  高超声速

Key words:  High-speed vehicle  Shock/boundary interferences  Multi-bodies spacious separation  Aero-interference  Hypersonic

摘要:

针对多体模型分离流动干扰机理问题，本文应用高速流场空间与壁面测试技术，对多体模型空中分离时面临的气动干扰问题开展了风洞试验研究。研究结果表明：空中分离流场气动干扰的本质特征源自高超声速流与多体运动界面相互作用的结果，具体表现形式可归结为三种典型气动干扰形式：（1）缝隙流的小尺度效应；（2）激波诱导边界层分离；（3）激波/激波干扰与激波/边界层干扰耦合。三种典型气动干扰形式会因为飞行器相对位置变化而相互转换，从而引起空中分离流场动力学性能变化，进而影响飞行器空中分离的安全性。

Abstract:

Aiming at the problem of separation flow interference mechanism of multibody model， by using of spacious and bounded-wall flow measurement technologies， wind tunnel test was carried out on the aerodynamic interference problem of multibody separation. Based on the experimental results， it shows that the nature of aero-interference of spacious separation flow lies in the interaction of hypersonic flow and movable multi-objectives. According to analyses and summarization of the experimental data， the complex aero-interference can be fallen into three patterns： （1） size effects of gap flow； （2） phenomena on boundary separation induced by shock wave； （3） shock/shock interferences and shock/boundary interferences. Three typical aero-interferences patterns will be converted to each other due to the change of the relative position of the aircraft， which changes the dynamic performance of separation flow field， and then affects the safety of spacious separation of the aircraft.