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Investigations of Liquid Metals as Thermally Driven Substance of the New Super Cooling Technique

Author: WangHongDa
Tutor: ChangHaiPing
School: Nanjing University of Aeronautics and Astronautics
Course: Engineering Thermophysics
Keywords: Heat exchanger Thermally driven Rotation The effect of heat transfer Liquid metal Corrosion
CLC: V231.1
Type: Master's thesis
Year: 2007
Downloads: 113
Quote: 0
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Abstract


The new super- cooling technology is based on the theory of a new cooling heat-driven technology . Preliminary study found that the difference of the thermal properties of the heat-driven medium heat-driven heat exchanger has a great impact . Experimental and numerical study of thermally driven heat transfer characteristics of liquid metal sodium -potassium alloy . First, the liquid metal structural materials compatibility , according to research at home and abroad , and summarizes the compatibility of materials in different liquid metal under certain conditions . Second , access to related materials sorted out the thermophysical properties of liquid alkali metal variation with temperature , thermally driven heat exchanger investigated by numerical calculation of thermophysical properties of liquid alkali metal . Then, sodium-potassium alloy and water heat-driven media , the rotating condition of the closed fluid circulation channel heat transfer characteristics of the heat-driven experimental study . Analysis of the heat flux density , rotation speed and cooling air speed driving the heat transfer characteristics of the sodium - potassium alloy heat . Experimental results show that when the heat flux density , rotation speed and cooling air speed is increased , the sodium-potassium alloy thermally driven heat transfer effect is significantly enhanced . Finally , the experiment compared the sodium -potassium alloy under the same conditions and the heat of the water to drive the effect of heat transfer , while the use of numerical simulation to compare the effects of sodium-potassium alloy heat exchanger and water with high thermal conductivity illustrated by the results of experimental and computational the coefficient of the liquid metal is superior than the effect of heat transfer of water . Experimental study and numerical calculation shows : with high thermal conductivity of the liquid metal can be applied to the new super - cooling technology can play a good cooling effect .

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CLC: > Aviation, aerospace > Aviation > Aero-engine ( propulsion system ) > Engine theory > Thermodynamics, heat transfer
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