HEAT TRANSFER IN THE REGION OF THERMAL STABILIZATION FOR LIQUID METALS FLOWING TURBULENTLY THROUGH PIPES (in Russian)
In previous theoretical studies of the heat transfer of turbulently flowing liquid metals at the inlet portion of the pipe (H. Poppendiek, et al. ORNL-913 & 914) the thermal contact resistance at the boundary layer between the wall and the liquid metal was not taken into account. Subsequent experimental work by others was based on the measurement of the wall temperature which is greatly affected by the contact resistance. This problem was therefore reexamined, determining the heat transfer coefficients from the temperature profile in the liquid metal stream and by direct measurements of the wall temperature. The method used allowed estimates of the inlet effects on the heat transfer together with the influence of the contact resistance to be made. Local heat transfer coefficients were determined during turbulent flow of the liquid metal at Prandti numbers oi 0.02 and Reynolds numbers between 10/sup 4/ to 10/sup 5/ while maintaining the hydrodynamic stabilization of the flow. The molecular and the turbulent heat transfer problems may be solved semi-empirically although no current theory can explain all the experimental data. the contact resistance can be treated only experimentally. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-16-033135
- OSTI ID:
- 4766596
- Journal Information:
- At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 13
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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