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跨声速激波振荡与空腔流动耦合机理及控制方法研究

  • 尹李筱 ,
  • 赵小见
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  • 北京理工大学宇航学院, 北京 100081
赵小见(1982—), 男, 博士, 副教授。E-mail:

尹李筱(2002—), 男, 硕士研究生。E-mail:

收稿日期: 2025-02-14

  网络出版日期: 2025-05-15

Coupling Mechanism and Control Methods of Transonic Shock Oscillation and Cavity Flow

  • YIN Lixiao ,
  • ZHAO Xiaojian
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  • School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China

Received date: 2025-02-14

  Online published: 2025-05-15

摘要

跨声速激波振荡与空腔流动均是可侧向机动火箭导弹强脉动压力及结构振动的主要诱因。然而, 现有研究多集中于讨论单一流动特征对壁面载荷环境的影响, 并未关注两种非定常流动现象的耦合作用, 为特定条件下飞行器的安全埋下一定的隐患。文中以典型火箭整流罩及侧壁空腔结构为研究对象, 采用延迟分离涡模拟(delayed detached eddy simulation, DDES)方法对跨声速激波振荡与空腔流动同时存在工况下的流场特征和脉动压力时频特性开展数值研究, 探讨激波振荡与空腔流动的耦合作用机理。研究结果表明:空腔流动减少了分离流对激波的作用从而减弱跨声速激波振荡的强度, 而激波振荡使得空腔流场趋于稳定, 显著降低了空腔壁面声压级(sound pressure level, SPL), 0.95Ma工况下最多可达30 dB。基于对跨声速耦合流场流动规律的认知, 设计了耦合流场的3种流动控制方案。对比结果发现:空腔前缘斜坡有利于促进激波振荡与空腔流动的相互抑制作用, 进而降低空腔壁面脉动压力水平。跨声速激波振荡与空腔流动耦合流场分析可为新一代飞行器研制提供一定支撑作用。

本文引用格式

尹李筱 , 赵小见 . 跨声速激波振荡与空腔流动耦合机理及控制方法研究[J]. 弹箭与制导学报, 2025 , 45(2) : 241 -250 . DOI: 10.15892/j.cnki.djzdxb.2025.02.015

Abstract

Transonic shock oscillations and cavity flows are both primary contributors to the intense pulsating pressures and structural vibrations in laterally maneuverable rocket missiles. However, existing studies have predominantly focused on single flow characteristics impacting on the wall load environment, while neglecting the coupling effects between two unsteady flow phenomena. This oversight poses potential risks to the flight safety of aerospace vehicles under specific flight conditions. In this study, a rocket fairing and a sidewall cavity structure are employed as the research subjects. The Delayed Detached Eddy Simulation (DDES) method is utilized to conduct a numerical investigation into the flow field characteristics and the time-frequency properties of pulsating pressures in the presence of both transonic shock oscillations and cavity flows, aiming to explore the coupling mechanisms between shock oscillations and cavity flows. The research findings indicate that cavity flows reduce the effect of separated flows on the shock, thereby weakening the intensity of transonic shock oscillations, while shock oscillations stabilize the cavity flow field, significantly lowering the sound pressure level (SPL) on the cavity walls, maximally, which can reach up to 30 dB at Mach 0.95. Based on the flow dynamics cognition in coupled transonic flow fields, 3 flow control strategies for the coupled flow field are designed. Comparative results reveal that a steep rise in leading edge of the cavity promotes the mutual inhibition of shock oscillations and cavity flows, thereby reducing the pulsating pressure levels on the cavity walls. The analysis of the coupled flow field involving transonic shock oscillations and cavity flows provides valuable support for the development of next-generation aerospace vehicles.

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