INVESTIGATION OF THE HEAT TRANSFER TO LIQUID SODIUM IN TUBES (in Russian)
Heat transfer tests of Na circulating under steady and turbulent flow conditions in electrically heated tubes were carried out using Cu, carbon steel, stainiess steel, and nickel tubes. The oxides were removed from the Na by a cold trap, keeping the 0 content between 5 x 10/sup -4/ and 3 x 10/sup -3/ wt. %. The flow rates ranged from 0.065 to 2.17 m/sec at temperatures between 190 and 310 deg C under a heat load of 18500 to 58000 kcal/m/sup 2/ sec. The heat transfer coefficients were calculated by the radial temperature distribution in the Na stream and the distribution of the wall temperature alongside the test section and in the liquid in the mixing chamber. Upon decreasing the Peclet (Pe) number, the Nusselt (Nu) number was found to decrease to values below the theoretical ones required by laminar flow; this phenomenon could not be explained on the basis of the contact heat resistance at the wall--liquid boundary. Systematic differences were noted in the average temperatures of the stream calculated by the two methods, at Pe numbers <200. In the Pe number range from 200 to 1150 the following relationship holds within an accuracy of plus or minus 10%: Nu = Pe- number range were below the data reported by other authors with different liquid metal heat transfer agents. The 0 content of the Na did not exert any noticeable effect. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-001615
- OSTI ID:
- 4844169
- 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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Related Subjects
COPPER
DISTRIBUTION
EFFICIENCY
ELECTRICITY
ENGINEERING AND EQUIPMENT
ERRORS
FLUID FLOW
HEAT TRANSFER
HEATING
LABORATORY EQUIPMENT
LIQUID FLOW
LIQUID METALS
LIQUIDS
MIXING
NICKEL
NUSSELT NUMBER
OXIDES
OXYGEN
PECLET NUMBER
SEPARATION PROCESSES
SODIUM
STAINLESS STEELS
SURFACES
TEMPERATURE
THERMAL RADIATION
THERMODYNAMICS
TUBES
TURBULENCE
VESSELS