Determination of the heat transfer coefficients in porous media
The process of transpiration cooling is considered. Methods are suggested for estimating the volumetric coefficient of heat transfer with the use of a two-temperature model and the surface heat transfer coefficient at entry into a porous wall. The development of new technology under conditions of increasing heat loads puts the search for effective methods of heat transfer enhancement in the forefront of theoretical investigations. One of the promising trends in the solution of this problem is the use of porous materials (PM) in the elements of power units. For thermal protection against convective or radiative heat fluxes, the method of transpiration cooling is successfully used. The mechanism operative in the thermal protection involves the injection of a coolant through a porous medium to produce a screen over the contour of a body in a flow for removing heat energy from the skeleton of the porous material.
- OSTI ID:
- 377002
- Journal Information:
- Journal of Engineering Physics and Thermophysics, Journal Name: Journal of Engineering Physics and Thermophysics Journal Issue: 6 Vol. 65; ISSN 1062-0125; ISSN JEPTER
- Country of Publication:
- United States
- Language:
- English
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