HEAT TRANSFER TO A TURBULENT FLOW OF LIQUID METAL WHERE HEAT LOAD IS DISTRIBUTED SINUSOIDALLY ALONG THE LENGTH OF THE PIPE (in Russian)
The distribution of a thermal load along the length of a pipe wall has a considerable effect on the distribution of local coefficients of heat exchange if the heat transfer medium has a prandtl number << 1. This conclusion also follows qualitatively from general considerations, since for liquid metal, because of its high"molecular" heat conductivity, boundary conditions will have a noticeable effect on the temperature field and will, consequently, be reflected in the values of local coefficients of heat exchange. A distribution of local Nu numbers along the length of the pipe is found for a sinusoidal distribution of heat load on the wall of a round pipe, with turbulent now of liquid metal and Pr number 0.025, for Re numbers 10 x 10/sup 3/, 50 x 10/sup 3/, and 100 x 10/sup 3/, and length/diameter ratios of 44.6, 67, and 100. The dimensionless coefficient of heat exchange Nu falls over the whole length of the pipe, but the greatest change in Nu is at the two ends of the pipe. When the temperature of the wall reaches a maximum in a section of the pipe, the coefficient of heat transfer is somewhat less than the value obtained from the formula q/sub CT/ = const.This difference is greater for small Re numbers and length/diameter ratios, and decreases with an increase in Re numbers and length/ diameter ratio. The position of the temperature maximum on the wall shifts somewhat along the flow of the transfer medium by comparison with results from the formula q/sub CT/ = const. This shift is greater for large Re numbers and for smaller length/diameter ratios. (auth)
- Research Organization:
- Inst. of Engineering Physics, Inst. of Thermophysics, Siberian Branch, Academy of Sciences, Moscow
- NSA Number:
- NSA-14-006417
- OSTI ID:
- 4203904
- Journal Information:
- Inzhener.-Fiz. Zhur., Akad. Nauk Belorus. S.S.R., Vol. Vol: 2, No. 12; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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