实验流体力学2018，Vol.32Issue(5)：1-6,6.DOI:10.11729/syltlx20180023
隔离段横向喷流作用下激波串运动特性研究
Characteristics of the shock train motions caused by transverse injections into the isolator
摘要
Abstract
Characteristics of the shock train motions in a two-dimensional inlet/isolator were investigated in a shock tunnel with a nominal Mach number of 6.The backpressure that supported the shock train was well controlled by using transverse injections into the isolator.High-speed schlieren and wall pressure measurements were carried out.Results show that the reflected shock waves in the inlet/isolator started flow form the background shock waves.As the transverse injections are opened, the downstream flow is accumulated with the increase of the backpressure and the induce of the shock train in the isolator.When the shock train moves upstream under the influence of the high backpressure, the shape and intensity of the leading shock in the shock train are changed by the background shock waves.Because strong adverse pressure gradients already exist near the incident points of the background shock waves, the leading shock of the shock train at the same side would be enhanced for moving upstream quickly.As the shock train is expelled out of the isolator, the leading shock oscillates near the shoulder for a short duration, until the backpressure is increased further to initiate the inlet buzz.When the backpressure is reduced by switching off the transverse injections, the inlet restarts.关键词
激波串/横向喷流/激波风洞/二元进气道/高速纹影Key words
shock train/transverse injection/shock tunnel/two-dimensional inlet/high-speed schlieren分类
航空航天引用本文复制引用
李一鸣,李祝飞,杨基明,吴颖川..隔离段横向喷流作用下激波串运动特性研究[J].实验流体力学,2018,32(5):1-6,6.基金项目
国家自然科学基金项目(11402263,11621202) （11402263,11621202）
