Affiliation of Author(s):能源与动力学院

Journal:Hangkong Dongli Xuebao

Abstract:In order to analyze the flow field characteristics of conical shock wave/boundary layer interactions induced by bumps with different shock wave system arrangements, three different bump compression surfaces were designed from the single cone, bipyramid and isentropic cone basic flow fields, respectively, by using the streamline tracing method. And such three basic flow fields had the same total deflection angle with the free stream Mach number 2.0. With the help of the numerical method, the three-dimensional shock wave/boundary layer interactions flow fields of such three bumps at different Mach numbers were compared. The results show that compared with single cone bump, the vorticity concentration regions in the flow fields of the bipyramid and isentropic bumps decrease evidently, the same with the vorticity values in the vortex core. Due to the interference of subsequent compression wave system, the flow patterns of the bipyramid and isentropic bumps don't perform in the quasiconical similarity manner. Besides, the bipyramid and isentropic bumps have the same level of ability with the single cone bump in diverting the boundary layer, and such ability keeps invariant with the change of the free stream Mach number. Furthermore, the multi-wave system arrangement can improve the total pressure recovery coefficient of the bump external compression system. And the total pressure recovery coefficient will go higher with the increase of the wave number, particularly at high Mach number. © 2018, Editorial Department of Journal of Aerospace Power. All right reserved.

ISSN No.:1000-8055

Translation or Not:no

Date of Publication:2018-02-01

Co-author:王娇,F70206627

Correspondence Author:Tan Huijun