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首页> 美国政府科技报告 >Mass, Momentum, and Heat Transfer within a Turbulent Boundary Layer with Foreign Gas Mass Transfer at the Surface. Part I. Constant Fluid Properties
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Mass, Momentum, and Heat Transfer within a Turbulent Boundary Layer with Foreign Gas Mass Transfer at the Surface. Part I. Constant Fluid Properties

机译：湍流边界层内的质量，动量和传热，表面有外来气体传质。第一部分。恒定流体特性

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A critical reexamination is made of existing experimental data on the velocity, temperature, and concentration profiles in a low-speed, constant property turbulent boundary layer with surface mass injection. It is found that a model of the boundary layer can be constructed that fits the local profile data as well as the local drag, mass, and heat-transfer coefficients at the surface. The essential features of the model include a 'law of the wall' that provides a continuous and smooth profile from the surface to the fully turbulent region and a 'wake region' that joins the inner region smoothly and is characterized by an eddy diffusivity that is constant with respect to distance from the wall. Four empirical parameters appear in the analysis: the Prandtl mixing length constant, K; the Clauser eddy diffusivity Reynolds number; an inner region mixing length constant analogous to Rotta's intercept constant; and a value of turbulent Schmidt or Prandtl number. Constant values of these parameters are found to be suitable in predicting data over a wide range of surface blowing or suction and Reynolds number. (Author)

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