Heat exchange during kinetic combustion in the turbulent boundary layer on a porous surface

1974 ◽  
Vol 6 (6) ◽  
pp. 993-999
Author(s):  
V. L. Dorot ◽  
Yu. V. Lapin ◽  
M. Kh. Strelets
Keyword(s):  
Boundary Layer ◽  
Heat Exchange ◽  
Turbulent Boundary Layer ◽  
Porous Surface

scholarly journals APPROXIMATE ESTIMATES OF COMPLEX HEAT EXCHANGE IN OPTICALLY THICKNESS AND OPTICALLY THIN TURBULENT BOUNDARY LAYER

2019 ◽  
Vol 41 (3) ◽  
pp. 20-25
Author(s):  
A.A. Avramenko ◽  
N.P. Dmitrenko ◽  
V.M. Kovalenko ◽  
V.G. Gorobets
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Heat Exchange ◽  
Turbulent Boundary Layer ◽  
Turbulent Layer ◽  
Complex Heat Transfer ◽  
Complex Heat Exchange

The article analyzes the main aspects of the process of complex heat transfer in an optically thin and optically thick boundary turbulent layer.

scholarly journals INTENSIFIED HEAT EXCHANGE AT THE TURBULENT CURRENT IN PIPES WITH TURBULIZERS WITH THE APPLICATION OF THE FOUR-LAYER MODEL OF THE TURBULENT BORDER LAYER DEPENDING ON THE NUMBER PRANDTLE

2018 ◽  
Vol 1 (12) ◽  
pp. 76-81
Author(s):  
Igor' Lobanov
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Boundary Layer ◽  
Heat Exchange ◽  
Turbulent Boundary Layer ◽  
Prandtl Number ◽  
Layer Model ◽  
Fourth Degree ◽  
Proportionality Coefficient ◽  
Prandtl Numbers

The main aspects of mathematical modeling of intensified heat transfer in turbulent flow in pipes with turbulators with the use of a four-layer model of a turbulent boundary layer are analyzed in the article, depending on the Prandtl number. The advantage of the law of the "fourth" degree is shown for large Prandtl numbers for the calculation of heat transfer in tubes with turbulators; It is shown that for tubes with turbulators the proportionality coefficient in this law is much higher than in smooth tubes, which indicates an increased level of turbulence in them at the boundary of the viscous and buffer sublayers. The results of calculating heat transfer for large Prandtl numbers have shown that the relative heat exchange with increasing Prandtl number increases rather insignificantly, especially after Pr>102; after Pr>103 it almost stabilizes

Interaction of a Shock Wave with a Turbulent Boundary Layer Disturbed by Injection

1980 ◽  
Vol 31 (2) ◽  
pp. 85-112 ◽  
Author(s):  
L.C. Squire ◽  
M.J. Smith
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Turbulent Boundary Layer ◽  
Turbine Blades ◽  
Adverse Pressure Gradient ◽  
Injection Rate ◽  
Porous Surface ◽  
Oblique Shock Wave ◽  
Surprising Result ◽  
Isentropic Compression

Summary:An experimental investigation has been made to study the interaction between an incident oblique shock wave and a turbulent boundary layer on a solid surface downstream of a porous surface with air injection through the porous surface. The results are clearly of direct interest to the design of cooled turbine blades. However, the boundary-layer profiles in the absence of the shock are similar to those in a boundary layer subjected to an adverse pressure gradient so that the results at the interaction also give some indication of the effects of an isentropic compression upstream of a shock/boundary-layer interaction. The experiments show the surprising result that the shock strength to produce incipient Separation is virtually independent of the shape of the boundary-layer profile upstream of the interaction, although the scale of the interaction increases with increase in the injection rate.

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