ID 56134
Title Alternative
Effects of Upstream Disturbances on Supersonic Flowfield with Transverse Injection
FullText URL
Author
河内 俊憲
浦本 翔平
升谷 五郎
Abstract
Effects of upstream disturbances on a transverse jet into Mach 2 supersonic flow were investigated by using single-time two-point spatial correlations of fluctuating velocities in the flowfield. The fluctuating velocity was measured by stereoscopic PIV. We categorized the upstream disturbances into two factors: incoming boundary layer on the injection port and weak oblique shock wave impinging ahead of the injection port. The velocity fluctuations in the upstream boundary layer had a long positive correlation region in the boundary layer. This is the evidence that very large-scale motion (VLSM) existed in the boundary layer developed on our test section. The correlation region bifurcated into the regions along the bow shock wave and the outer jet boundary. The correlation length was 10-hold longer than the boundary layer thickness. Fluctuation of the weak shock wave was induced by VLSM developed on the opposite wall to the injection wall. The velocity fluctuation due to the weak shock wave also had a long positive correlation region along the oblique shock wave. However, it had no correlation with the jet.
Keywords
Scramjet Combustor
Wall Injection
Spatial Correlation
Turbulence
Very Large Scale Motion
Stereoscopic PIV
Published Date
2016-08-05
Publication Title
日本航空宇宙学会論文集
Volume
volume64
Issue
issue4
Publisher
日本航空宇宙学会
Start Page
244
End Page
252
ISSN
13446460
NCID
AA11307372
Content Type
Journal Article
language
日本語
OAI-PMH Set
岡山大学
File Version
publisher
DOI
Related Url
isVersionOf https://doi.org/10.2322/jjsass.64.244