Affiliation of Author(s):College of Aerospace Engineering

Teaching and Research Group:高速风洞实验室

Journal:J. Fluid Mech.

Place of Publication:Cambridge University Press

Funded by:国家自然科学基金

Key Words:flow–structure interactions, high-speed flow, boundary-layer separation

Abstract:In this paper, the incident shock–separation shock interactions on a surface plate near the leading edge are studied theoretically and experimentally, and the transition from regular reflection (RR) to Mach reflection (MR) is the main focus. The theoretical method employs free interaction theory (FIT) and the minimum entropy production (MEP) principle to analyse the separation shock strength of flow separated from the boundary layer and separated from the leading edge, respectively, the criterion based on the MEP principle is employed to predict the RR-to-MR transition near the leading edge. The experiments were performed on a rotatable wedge situated over a sharp leading-edge plate such that the wedge could continuously change the flow deflection angle from 0◦ to 40◦ by means of a high-precision control device. Fast-response transducers and a high-speed camera were used to measure dynamic pressures and to take schlieren images, respectively. The influences of wedge positions, Reynolds

Indexed by:期刊论文

Document Code:doi:10.1017/jfm.2021.421

Discipline:Engineering

First-Level Discipline:Mechanics

Volume:919

Issue:A40

Page Number:A40 1-21

ISSN No.:0022-1120

Translation or Not:no

Date of Publication:2021-06-01