Affiliation of Author(s):College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing, 210016

Teaching and Research Group:High Speed Wind tunnel Laboratory(HSWL)

Journal:Acta Astronautica

Place of Publication:Elsevier

Funded by:National Natural Science Foundation of China

Key Words:Background-oriented schlieren;3D reconstruction;Quantitative measurement;Visualization of flow field

Abstract:To study the three-dimensional flow structure of an incident shock/boundary layer interaction, a M2.7 nozzle model with a ramp was tested based on the background-oriented schlieren (BOS) technique. After comparing the results of CFD, shear-sensitive liquid crystal (SSLC), and high-speed schlieren, we conclude that BOS can capture the internal structure of the flow field and that its results are consistent with those of other methods in which the relative error can be controlled to 7%. In this research, a new type of experiment with several light paths was used with BOS technology. Three-dimensional reconstruction of incident oblique shock (primarily the width of Mach stem of the shock wave) and quantitative results of the flow field can be obtained successfully, and BOS shows great potential for the measurement of flow fields.

Indexed by:Journal paper

Document Code:Acta Astronautica 2019（157）, 341-349

Discipline:Engineering

First-Level Discipline:Aeronautical and Astronautical Science and Technology

Document Type:J

Volume:157

Page Number:341-349

Number of Words:4107

ISSN No.:0094-5765

Translation or Not:no

Date of Publication:2019-01-01

Included Journals:SCIE