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传热学
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ISSN 打印: 1064-2285
ISSN 在线: 2162-6561

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传热学

DOI: 10.1615/HeatTransRes.v32.i7-8.160
10 pages

Thermal Boundary Layer in the Presence of Upper Bypass Transition

Eleonora Ya. Epik
Institute of Engineering Thermophysics of National Academy of Sciences of Ukraine (IET NASU), 2a Zhelyabov Str., 03057, Kyiv, Ukraine
V. A. Grigorenko
Institute of Technical Thermophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine

ABSTRACT

The results of experimental investigation of heat transfer are presented for the case of origin of the "upper" bypass laminar-turbulent transition. On the basis of an analysis of integral and local characteristics of hydrodynamic and thermal boundary layers a method is proposed for calculation of heat transfer enhancement in terms of turbulent viscosity at the outer edge of the hydrodynamic boundary layer. The substantiations of the calculation method using coefficients of longitudinal intermittency are developed. The promise of this method for hydrodynamic intermittency and necessity of its further revision for thermal one is shown.


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