INVESTIGATION ON RESISTANCE AND HEAT TRANSFER OF TURBULENT AIR FLOW IN AXISYMMETRICAL CHANNELS WITH LONGITUDINAL PRESSURE GRADIENT
Experimental investigations on the properties of a turbulent boundary layer are reported, for a flow of heated air in axisyrametrical diffuser and confuser channels having cooled walls. The experimental set-up makes possible a determination of the influence of longitudinal pressure gradients and cooling intensity upon the properties of dynamic and heat boundary layers. The treatment and generalization of the experimental data are carried out in a parametric form. Dependences of form parameters, characterizing the form of the velocity and tempcrature profile, but also determining the law of friction and heat transfer from the longitudinal pressure gradient, are found. These dependences on the longitudinal pressure gradient are found, and given in the form of design equations. The experimental material obtained makes possible development of methods of calculation of a turbulent layer for gas flow with both longitudinal pressure gradient and heat transfer, which makes possible determinations of thicknesses of momentum and energy loss, thicknesses of dynamic and heat displacement, and the tangential stress and specific heat flow on a wall. Moreover, the results are presented of an experimental investigation on the distributton of the tangential stress and specific heat flow, as well as that of turbulent transfer coefficients of momentum and heat, by a section of the turbulent boundary layer at the gradient flow. (auth)
- Research Organization:
- Moscow State Timber Inst.
- NSA Number:
- NSA-16-020606
- OSTI ID:
- 4828885
- Journal Information:
- Intern. J. Heat and Mass Transfer, Vol. Vol: 5; Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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