Affiliation of Author(s):能源与动力学院
Journal:Aerodyn. Meas. Technol. Ground Test. Conf.
Abstract:The purpose of the present research is to address a new method to reconstruct pressure distributions from velocity measurements by particle image velocimetry (PIV) in supersonic flows containing shock waves. The basic principle of the proposed method mainly depends on MacCormack’s technique, which is the standard algorithm in computational fluid dynamics (CFD). Under the assumption of adiabatic condition in whole flow fields, the basic equation for this new method can be obtained from the conservative momentum equation, and the performance is compared with that of the space-marching method proposed in literature by using CFD velocity fields, including one-dimensional flows with normal shocks and two-dimensional flows with oblique shocks and bow shocks respectively. The results show that this new approach is more accurate than the space-marching method, especially for high-speed flows containing strong shock waves. Moreover, the generality of the MacCormack method has been confirmed by using it in the incompressible flow, subsonic flow and transonic flow. These studies extend PIV-based pressure reconstruction method further for supersonic flows with shocks. Therefore, it has important significances to aerospace researches. © 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Translation or Not:no
Date of Publication:2017-01-01
Co-author:Liu, Shun,F70206625
Correspondence Author:Xu Jinglei