磁场作用下水或油的沸腾换热实验

The Mechanism of Magnetic Field Strengthening the Pool Boiling with Oil or Water

对水和柴油在不同磁场强度、不同热流密度的条件下池内沸腾现象进行实验.结果表明:在磁场作用下,水和柴油的升温速率都随着磁场强度增强、磁化时间的延长而发生明显增大;同时磁场作用能使水和油的比热容和油的黏度有所降低.还对有、无磁场下的水和油导热特性进行了对比,分析了水和油在磁场作用下的导热规律,最后对在该领域的研究方向及重点提出了建议.

A series of experiments of pool boiling are carried out and many groups of experimental data are obtained at different heat flux and magnetic strength. The results show that the greater magnetic strength is, the temperature rising rate of the sample increase appreciably with the magnetic field, and the longer the magnetization time is, that of the sample increases faster. The specific heat capacity of the water and oil and the viscosity of oil are decreased greatly. It is important for the area of energy engineering that magnetic field can intensify boiling. In order to analysis the thermal conduction disciplinarian of oil and water under the effect of magnetic field, the thermal conduction characteristics of oil and water without magnetic field is also compared. The research lays a foundation on exploring the mech- anism of magnetic field enhancing boiling heat transfer and its practical application in engineering.