Paper Info
Title
Experimental Investigation Of Supersonic Turbulent Flow Over Cylinders With Various Heights
Abstract
The unsteady flow structures and pressure fluctuations of the cylinder-induced shock wave/boundary layer interactions (SBLIs) were investigated at Mach 3.4 and 3.8. The cylinders were mounted on the test section floor with a turbulent boundary layer, and six cylinders with various heights have been tested. The nanoparticle-based planar laser scattering (NPLS) flow visualization tests were performed, and the different features of shock systems as well as the "breath" effects of the separation bubble, have been validated by NPLS images. Dynamic pressure transducers were used to characterize the pressure fluctuations, and a remarkable spectra change was noticed around the cylinder foot. With increasing height, the PSD curve of x/D = - 1 ahead of the cylinder shaped from one-peak pattern to two-peaks pattern, while the second frequency peak showed a typical frequency of f approximate to 32 kHz. It was inferred that the first peak was more influenced by the free end of the cylinder and the detached shock. The second peak pattern of f approximate to 32 kHz was presumed to be affected by the vortex breakdown near the cylinder foot through analysis of flow visualization. Low frequency around 0 similar to 3 kHz was found to have an obvious rise at x/D = - 2, close to the typical frequency of SBLIs.
Year
DOI
Venue
2021
10.1007/s12650-020-00723-1
JOURNAL OF VISUALIZATION
Keywords
DocType
Volume
Sblis, Cylinder, NPLS, Flow visualization, Pressure fluctuations
Journal
24
Issue
ISSN
Citations 
3
1343-8875
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Dun-Dian Gang141.97
Yi Shihe2105.42
Haibo Niu300.68