大宽高比大S弯扩压器流动特性和流动控制

FLOW CHARACTERISTIC AND FLOW FCONTROL OR HIGH ASPECT RATIO AND HIGHLY CURVED S-BEND DITTUSER

关键词:  进气道  流动特性  边界层控制

Key words:  Inlet  Flow characteristic  Boundary layer control

摘要:

对大宽高比大S弯亚音扩压器的流动进行了试验研究,通过流谱观察、壁面静压分布曲线、截面总压分布图和出口截面旋流场分析其流动特性.此外,试验表明在分离点前安装适当结构参数的埋入附面层涡流发生器能够大大缩小分离区的范围,从而使其性能得到改善.

Abstract:

This paper presents the experimental results of the flow characteristic in a high aspect ratio and highly curved S-berid subsonic diffuser.The flow feature is analysed by using the flow visualization,the static pressure distribution,the total pressure contour map and the swirl flow field at exit.The paper also presents the result of separation control in the S-bend diffuser.The experimental result shows that the separation region can be reduced and the diffuser performance can be improved by using the boundary-layer submerged vortex generators if the location installed and the geometrical parameters of the vortex generator are selected property.