Curved Boundary Layer Rake Measurement in the Trisonic Gasdynamic Facility

2012 ◽  
Author(s):  
Ryan Schmit
Keyword(s):  
Boundary Layer ◽  
Curved Boundary

Momentum Integral for Curved Shear Layers

1975 ◽  
Vol 97 (2) ◽  
pp. 253-256 ◽  
Author(s):  
Ronald M. C. So
Keyword(s):  
Boundary Layer ◽  
Shear Layers ◽  
Two Dimensional ◽  
Boundary Layer Flows ◽  
Displacement Effect ◽  
Curved Boundary ◽  
Curvature Effects ◽  
Von Karman ◽  
Momentum Integral ◽  
Von Kármán

If the exact metric influence of curvature is retained and the displacement effect neglected, it can be shown that the momentum integral for two-dimensional, curved boundary-layer flows is identical to the von Karman momentum integral. As a result, attempts by previous researchers to account for longitudinal curvature effects by adding more terms to the momentum integral are shown to be correct.

scholarly journals A study of the effect of curvature on fully developed turbulent flow

1935 ◽  
Vol 148 (865) ◽  
pp. 565-598 ◽  
Keyword(s):  
Boundary Layer ◽  
Turbulent Flow ◽  
Boundary Layers ◽  
Cross Section ◽  
Variable Thickness ◽  
Curved Surfaces ◽  
Constant Cross Section ◽  
Curved Channel ◽  
Curved Boundary ◽  
Fully Developed Turbulent Flow

1—The solution of many important problems in aeronautics and hydraulics depends largely on the behaviour of turbulent flow along curved surfaces. In flow along plane surfaces the following method has proved to be successful. The laws of turbulent velocity distribution were investigated in straight tubes and channels of constant cross-section and the results applied to the boundary layer with variable thickness. The present work has undertaken with the idea of isolating the effect of curvature on the turbulent flow as much as possible, by using a curved channel of constant curvature and cross-section. It is hoped that the results of these experiments may be applied later to the general case of curved boundary layers.

Curved boundary layer meshing for adaptive viscous flow simulations

2010 ◽  
Vol 46 (1-2) ◽  
pp. 132-139 ◽  
Author(s):  
O. Sahni ◽  
X.J. Luo ◽  
K.E. Jansen ◽  
M.S. Shephard
Keyword(s):  
Boundary Layer ◽  
Viscous Flow ◽  
Curved Boundary ◽  
Flow Simulations ◽  
Boundary Layer Meshing

Measurements of the Turbulent Transport of Heat and Momentum in Convexly Curved Boundary Layers: Effects of Curvature, Recovery and Free-Stream Turbulence

1988 ◽  
Vol 110 (1) ◽  
pp. 80-87 ◽  
Author(s):  
J. Kim ◽  
T. W. Simon
Keyword(s):  
Boundary Layer ◽  
Turbulence Intensity ◽  
Free Stream ◽  
Turbulent Transport ◽  
Turbulent Prandtl Number ◽  
Hot Wire ◽  
Reynolds Analogy ◽  
Curved Boundary ◽  
Free Stream Turbulence ◽  
Wire Probe

The effects of streamwise convex curvature, recovery, and free-stream turbulence intensity on the turbulent transport of heat and momentum in a mature turbulent boundary layer are investigated. A special three-wire hot-wire probe developed for this purpose is described. Two cases with free-stream turbulence levels of 0.68 and 2.0 percent, taken in the same facility with moderate strength of curvature, δ/R = 0.03, are compared. Profiles of u′v′, t′, u′t′, and v′t′ are dramatically reduced within the curve, with asymptotic profiles being achieved quickly for the low TI case. Recovery occurs rapidly, with the profiles often overshooting flat-wall upstream values. Increased free-stream turbulence has the effect of increasing the profiles throughout the boundary layer on the flat developing wall. Profiles agreeing with the asymptotic profiles of the low TI case are observed by the end of the curve, however, illustrating the dominance of curvature over free-stream turbulence intensity. For the higher TI case, a reversal in the sign of u′v′ in the outer half of the boundary layer is observed, leading to negative values of the turbulent Prandtl number in this region. This indicates a breakdown in Reynolds analogy.

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