Discussion: “Free Turbulent Shear Layers on Plug Nozzles” (Scott, C. J., and Rask, D. R., 1977, ASME J. Fluids Eng., 99, pp. 301–308)

1977 ◽  
Vol 99 (2) ◽  
pp. 309-309
Author(s):  
S. F. Birch
Keyword(s):  
Shear Layers ◽  
Turbulent Shear ◽  
Plug Nozzles

Free Turbulent Shear Layers on Plug Nozzles

1977 ◽  
Vol 99 (2) ◽  
pp. 301-308
Author(s):  
C. J. Scott ◽  
D. R. Rask
Keyword(s):  
Turbulent Mixing ◽  
Schmidt Number ◽  
Error Function ◽  
Mixing Layer ◽  
Shear Layers ◽  
Turbulent Shear ◽  
Gas Chromatograph ◽  
Plug Nozzle ◽  
Turbulent Schmidt Number ◽  
Plug Nozzles

Two-dimensional, free, turbulent mixing between a uniform stream and a cavity flow is investigated experimentally in a plug nozzle, a geometry that generates idealized mixing layer conditions. Upstream viscous layer effects are minimized through the use of a sharp-expansion plug nozzle. Experimental velocity profiles exhibit close agreement with both similarity analyses and with error function predictions. Refrigerant-12 was injected into the cavity and concentration profiles were obtained using a gas chromatograph. Spreading factors for momentum and mass were determined. Two methods are presented to determine the average turbulent Schmidt number. The relation Sct = Sc is suggested by the data for Sc < 2.0.

Management of Turbulent Shear Layers in Separated Flow

1978 ◽  
Vol 15 (7) ◽  
pp. 385-386 ◽  
Author(s):  
W.W. Willmarth ◽  
R.F. Gasparovic ◽  
J.M. Maszatics ◽  
J.L. McNaughton ◽  
D.J. Thomas
Keyword(s):  
Separated Flow ◽  
Shear Layers ◽  
Turbulent Shear
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