Research on self-excited oscillation flows in inlet of ramjet

LIU Zhan-sheng; ZHANG Yun-feng; TIAN Xin

Chinese

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Research on self-excited oscillation flows in inlet of ramjet

更新时间：2026-07-07

- Research on self-excited oscillation flows in inlet of ramjet
- Vol. 23, Issue 9, (2008)
- 作者机构：
  
  哈尔滨工业大学能源科学与工程学院,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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LIU Zhan-sheng, ZHANG Yun-feng, TIAN Xin. Research on self-excited oscillation flows in inlet of ramjet[J]. 2008, 23(9).
DOI：

LIU Zhan-sheng, ZHANG Yun-feng, TIAN Xin. Research on self-excited oscillation flows in inlet of ramjet[J]. 2008, 23(9). DOI：

摘要

当冲压发动机超声速进气道工作在一定条件下时

会出现自激振荡现象.采用数值模拟方法研究了某超声速进气道结构的自激振荡现象

分析了振荡时进气道内流场的变化过程.研究表明发生自激振荡时进气道中流动产生大幅脉动

造成进气道壁板结构承受周期变化的气动载荷

载荷振荡频谱中包含多个特征频率

其与声模态频率相重合

表明自激振荡现象与声模态的相关性.

Abstract

Self-excited oscillation may arise when the inlet of ramjet is under a certain condition.This phenomenon for a supersonic inlet was numerically studied

and changes in fluid flow fields were analyzed.The results demonstrate that

in the occurrence of oscillation

the fluid flow in inlet generates large amplitude

resulting in violent periodic aerodynamic loads on ramjet wall structures.The frequency spectrum of oscillation comprises some characteristic frequencies similar with acoustic modal frequencies

implying a close relationship between acoustic modes and self-excited oscillation.

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