Calculation of Turbulent Boundary Layers with Heat Transfer and Pressure Gradient Utilizing a Compressibility Transformation. Part 2: Constant Property Turbulent Boundary Layer Flow with Simultaneous Mass Transfer and Pressure Gradient PDF Download
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Author:
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Category :
Languages : en
Pages : 52
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Author:
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ISBN:
Category :
Languages : en
Pages : 52
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Author: J. Boccio
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Category : Equations of motion
Languages : en
Pages : 50
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Book Description
An analysis of the incompressible turbulent boundary layer, developing under the combined effects of mass transfer and pressure gradient, is presented in this paper. A strip-integral method is employed whereby two of the three governing equations are obtained by integrating the combined momentum and continuity equation to 50 percent and 100 percent, respectively, of the boundary-layer height. The latter equation is the usual momentum-integral equation; the former equation requires specification of shear. Accordingly, Clauser's equilibrium eddy-viscosity law is assumed valid at this point. The third and final equation is obtained by specifying that Stevenson's velocity profiles apply throughout the domain of interest, from which a skin-friction law can be derived. Comparisons of the numerical results with the experiments of McQuaid, which include combined effects of variable pressure gradient and mass transfer, show good agreement.
Author: J. Boccio
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Category :
Languages : en
Pages : 42
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Author: C. Economos
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Category : Boundary layer
Languages : en
Pages : 82
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The analysis uses a compressibility transformation and utilizes higher order closure rules to complete the transformation. By requiring that the momentum equations in differential form be satisfied at the wall and at the sublayer edge, correspondence rules are obtained which relate the variable property (VP) flow to a constant property (CP) flow in which mass transfer and pressure gradient occur simultaneously. A new CP formulation is developed and numerical results for a variety of cases are presented. Comparisons with earlier forms of the transformation and with experiment are included. For the zero pressure gradient case some differences between the various predictions are observed. For the several pressure gradient cases examined, the results are found to be essentially identical to those given by first order closure rules; i.e., by a form of transformation which relates the VP flow to a CP flow with pressure gradient but zero mass transfer.
Author:
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Category :
Languages : en
Pages : 110
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Author:
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ISBN:
Category :
Languages : en
Pages : 52
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Category : Aeronautics
Languages : en
Pages : 1572
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Category : Government publications
Languages : en
Pages : 1932
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Author:
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Category :
Languages : en
Pages :
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Author: Constantino Economos
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Category : Heat
Languages : en
Pages : 52
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Book Description
This report investigates the behavior of high speed turbulent boundary layer with heat transfer and streamwise pressure gradient.
