NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Laser interferometer skin-friction measurements of crossing-shock-wave/turbulent-boundary-layer interactionsWall shear stress measurements beneath crossing-shock-wave/turbulent boundary-layer interactions have been made for three interactions of different strengths. The interactions are generated by two sharp fins at symetric angles of attack mounted on a flat plate. The shear stress measurements were made for fin angles of 7 and 11 deg at Mach 3 and 15 deg at Mach 3.85. The measurements were made using a laser interferometer skin-friction meter, a device that determines the wall shear by optically measuring the time rate of thinning of an oil film placed on the test model surface. Results of the measurements reveal high skin-friction coefficients in the vicinity of the fin/plate junction and the presence of quasi-two-dimensional flow separation on the interaction center line. Additionally, two Navier-Stokes computations, one using a Baldwin-Lomax turbulence model and one using a k-epsilon model, are compared with the experimental results for the Mach 3.85, 15-deg interaction case. Although the k-epsilon model did a reasonable job of predicting the overall trend in portions of the skin-friction distribution, neither computation fully captured the physics of the near-surface flow in this complex interaction.
Document ID
19950056496
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Garrison, T. J.
(Pennsylvania State University University Park, PA, United States)
Settles, G. S.
(Pennsylvania State University University Park, PA, United States)
Narayanswami, N.
(Rutgers University Piscataway, NJ, United States)
Knight, D. D.
(Rutgers University Piscataway, NJ, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1994
Publication Information
Publication: AIAA Journal
Volume: 32
Issue: 6
ISSN: 0001-1452
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
95A88095
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-89-0315
CONTRACT_GRANT: NGT-50952
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available