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Published September 1969 | Published
Journal Article Open

Experiments in supersonic turbulent flow with large distributed surface injection

Abstract

The mean velocity and pressure fields in a turbulent boundary layer on a Hat plate at M∞ = 2.6 are investigated for ratios of mass-How per unit area injected at the wall to that at the edge of the boundary layer (Λ_e) between 0 and 0.03. Two-dimensionality is demonstrated, and a similar How approached with linear growth of momentum and displacement thicknesses. A Howarth-Dorodnitsyn transformation for the normal coordinate is found to bring the data into good agreement with incompressible results for the same value of Λ_e. At the highest injection rate, the transformed velocity profiles agree well with incompressible turbulent mixing layer results. Finally, the induced side forces are found to be comparable to those obtained by equivalent injection through a slot.

Additional Information

© 1969, by the American Institute of Aeronautics and Astronautics. Reprinted from AIAA JOURNAL, Vol. 7, No.9, September 1969, pp. 1759-1767. Presented as Paper 68-129 at the AIAA 6th Aerospace Sciences Meeting, New York, January 22-24,1968; submitted September 23, 1968; revision received February 24, 1969. This work was supported by the U.S. Army Research Office and the Advanced Research Projects Agency, Contract DA-31-124-ARO(D)-33.

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September 14, 2023
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