【摘要】 对管内油的层流流动换热采用内插螺旋线圈和外加高压电场两种强化技术进行了复合强化换热实验研究。实验结果发现 ,内插螺旋线圈强化管可以强化层流对流换热大约一倍左右 ;同时采用高压电场强化换热技术后 ,换热强化率可以再提高 4倍左右 ;油温、流速对换热强化率没有显著影响 ,换热强化特性基本取决于外加高压电场更多还原

【Abstract】 An experimental study of combined-intensification heat transfer was conducted by using two intensification techniques to the laminar flow heat transfer of in-tube oil, namely, the installation of internally inserted spiral coils and an externally added high-voltage electric field. The result of the experiment indicates that the intensification tube with the use of internally inserted spiral coils can lead to an enhancement of convection heat transfer of the laminar flow by about 100%. The use of intensified heat exchange with the help of a high-voltage electric field in addition to the above approach can further enhance the heat exchange intensification rate by about four times. Oil temperature and its flow speed do not exert any significant influence on the heat exchange intensification rate. The heat exchange intensification rate basically depends on the externally applied high-voltage electric field.更多还原