HEAT TRANSFER TO AN Na-K ALLOY IN AN ANNULUS (in Russian)
Heat transfer coefficients in annuli were determined by measuring the temperature at a considerable distance from the channel entrance. The experiments were carried out with two-side and one-side heat supplies to 2.5, 3.5, and 4.5 mm annuli. The Nusselt criterion ior narrow annuli (d/sub 1//d/sub 2/ 1) is about 25 to 30% less than for round tubes with identical Peclet values and is in good agreement with theoretical data. The Nusselt value for annuli (two-side heat supply at Peclet number exceeding 500) also agrees with theoretical data and exceeds by 1.3 to 1.5 folds the Nusselt number for round tubes. Consequently, the experiments confirm the theoretical postulation that the geometry of the channel and the means of heat supply influence heat transfer in heat carriers with small Prandtl numbers. (R.V.J.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-006104
- OSTI ID:
- 4100871
- Journal Information:
- Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 9
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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