Effect of temperature on flow electrification characteristics under DC voltage

Summary

The aim of this work is to analyse the effect of temperature on oil flow electrification when DC voltage is applied. A special experimental set up had been perfected in which the transformer oil was flowing in a circular loop and the streaming current was recorded. This experiment was tested between 40?C and 60?C. The results reveal that the polarity of streaming current depends on the sample configuration at 40?C. And the streaming current is always enhanced with the increasing of applied voltage. But the situation is different at 50?C and 60?C. At 50?C, while the voltage increases, the streaming current may decreases to negative at first. Then it tends to increase until the polarity reverses to positive and keep enlarged as voltage increases. At 60?C with the same sample configuration, streaming current has the same changing process. This result can be explained in terms of the difference of mobility between positive and negative carriers while temperature increases.

Additional informations

Authors

J. DAI, C. CHENG, Y. JIANG

Keywords

Oil flow electrification, Temperature influence, Ion mobility