A Gun Tunnel Investigation of Hypersonic Free Shear Layers in a Planar Duct

Buttsworth, DR, Morgan, RG and Jones, TV (1995) A Gun Tunnel Investigation of Hypersonic Free Shear Layers in a Planar Duct. Journal of Fluid Mechanics, 299 133-152. doi:10.1017/S0022112095003454

Author Buttsworth, DR
Morgan, RG
Jones, TV
Title A Gun Tunnel Investigation of Hypersonic Free Shear Layers in a Planar Duct
Journal name Journal of Fluid Mechanics   Check publisher's open access policy
ISSN 0022-1120
Publication date 1995-09-01
Year available 1995
Sub-type Article (original research)
DOI 10.1017/S0022112095003454
Open Access Status Not yet assessed
Volume 299
Start page 133
End page 152
Total pages 20
Place of publication NEW YORK
Language eng
Subject 3104 Condensed Matter Physics
2211 Mechanics of Materials
2210 Mechanical Engineering
Abstract An experimental investigation of high Mach number free shear layers has been undertaken. The experiments were performed using a Mach 7 gun tunnel facility and a planar duct with injection from the base of a central strut producing a Mach 3 flow parallel to the gun tunnel stream. This configuration is relevant to the development of efficient scramjet propulsion, and the gun tunnel Mach number is significantly higher than the majority of previous supersonic turbulent mixing layer investigations reported in the open literature. Schlieren images and Pitot pressure measurements were obtained at four different convective Mach numbers ranging from 0 to 1.8. Only small differences between the four cases were detected, and the relatively large high-speed boundary layers at the trailing edge of the struct injector appear to strongly influence the shear layer development in each case. The Pitot pressure measurements indicated that, on average, the free shear layers all spread into the Mach 3 stream at an angle of approximately 1.4 degrees, while virtually no spreading into the Mach 7 stream was detected until all of the low-speed stream was entrained. The free shear layers were simulated using a PNS code; however, the experimentally observed degree of spreading rate asymmetry could not be fully predicted with the k-epsilon turbulence model, even when a recently proposed compressibility correction was applied.
Keyword Turbulent Mixing Layers
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 9 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sat, 27 Apr 2013, 04:18:53 EST by System User