实验流体力学2025，Vol.39Issue(5)：100-107,8.DOI:10.11729/syltlx20230155
冲压发动机进气道气动弹性试验研究
The experimental investigation of ramjet inlet aeroelasticity
田海涛 1苑凯华 1何海波 1侯良学 2程萌1
作者信息
- 1. 北京机电工程研究所,北京 100074
- 2. 中国航空工业空气动力研究院,沈阳 110034
- 折叠
摘要
Abstract
The flow of the inlet of the ramjet engine is complex,and the structure of the inlet wall plate is very easy to induce aeroelastic problems under the requirements of lightweight structural design.In order to study the influence of aeroelasticity on the performance of the ramjet inlet,the aeroelastic wind tunnel test of the inlet was carried out.The stiffness design of the structure of the inlet lip and the internal inlet panel was carried out,and the influence of the aeroelasticity of the inlet tract on the performance of the inlet tract and the structural dynamics response characteristics under the high-speed flow condition were studied.The results of the wind tunnel test show that the maximum elastic deformation of the inlet lip structure is about 2.25 mm,accounting for 1.3%of the inlet's lip width,resulting in a decrease of about 5%in the total pressure recovery coefficient of the inlet tract,an increase of about 10%in the flow coefficient of the inlet tract,and a significant change in the inlet performance.Under the action of complex shock waves,the internal wall plate structure of the inlet duct presents obvious static deformation characteristics.There is high-frequency vibration on the basis of static deformation,and the vibration frequency is close to the high-order mode frequency of the wall plate.The results of this paper show that aeroelasticity has a significant effect on the performance of ramjet engine inlet tracts.Therefore,the influence of aeroelasticity should be considered in the refined design of the air inlet aerodynamics and structure.关键词
冲压发动机/进气道/气动弹性/进气道壁板/进气道唇口/结构动力学/总压恢复系数Key words
ramjet/inlet/aeroelastic/inlet panel/inlet lip/structural dynamics/total pressure recovery coefficient引用本文复制引用
田海涛,苑凯华,何海波,侯良学,程萌..冲压发动机进气道气动弹性试验研究[J].实验流体力学,2025,39(5):100-107,8.
