Effects of Wall Cooling and Leading-edge Blunting on Ramp-induced, Laminar Flow Separations at Mach Numbers from 3 Through 6

Effects of Wall Cooling and Leading-edge Blunting on Ramp-induced, Laminar Flow Separations at Mach Numbers from 3 Through 6
Author: J. Don Gray
Publisher:
Total Pages: 128
Release: 1972
Genre: .
ISBN:
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The effects of wall cooling and nose bluntness on laminar and transitional reattaching flows induced by a 9.5-degree ramp were investigated at Mach numbers from 3 through 6 measuring the longitudinal surface pressure and heat-transfer rate distributions, as well as the flow-field pressures, at several longitudinal stations. Reynolds number based on flat-plate length was varied from 0.25 to 1.0 million. The trend in the change in interaction length with Reynolds number increase indicated laminar reattachment at all test Reynolds numbers at M = 6 and transitional at the two higher Reynolds numbers at M = 3.

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports
Author:
Publisher:
Total Pages: 456
Release: 1995
Genre: Aeronautics
ISBN:
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Turbulent Boundary-layer Separation Induced by Flares on Cylinders at Zero Angle of Attack

Turbulent Boundary-layer Separation Induced by Flares on Cylinders at Zero Angle of Attack
Author: Donald M. Kuehn
Publisher:
Total Pages: 36
Release: 1961
Genre: Noses (Space vehicles)
ISBN:
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Separation caused by the pressure rise induced by flares has been experimentally investigated in the Mach number range of 1.5 to 5.0 and in the Reynolds number range (based on boundary-layer thickness) of 1.5X104 to 12X104. The purpose of the investigation was to determine the model geometry and flow conditions for which separation can be expected for a turbulent boundary layer of zero pressure gradient on the cylinder approaching the flare. Comparisons are made of the boundary-layer-separation characteristics of these three-dimensional flares with two-dimensional separation results from a previous investigation.