偏二甲肼悬浊液电流变特性的实验研究

Experimental Investigation on Electrorheological Characteristics of UDHM Suspension

采用混合绝缘油的方法改善了偏二甲肼(UDMH)弱绝缘特性,实现了UDMH悬浊液的电流变效应。利用电流变测试装置对UDMH悬浊液进行实验研究,分析不同电场强度和藻酸介质含量对UDMH悬浊液电流变特性的影响。结果表明,悬浊液在无电场和有电场下的质量流率均随介质质量分数增加而减少,但变化趋势不同;随介质质量分数增加,无电场时质量流率不断减少,而有电场时质量流率趋于定值,此值受电场强度和介质质量分数相互作用影响;5%UDMH含量的悬浊液,在藻酸介质含量30%、电场强度2kV·mm^(-1)时的电流变效应最佳;偏二甲肼含量对UDMH悬浊液绝缘性有很大影响,其含量小于15%的悬浊液都可实现电流变效应。

The weak insulation characteristics of unsymmetric dimethyl hydrazine(UDMH)were improved by means of mixing with the insulating oil,which realized the electrorheological effect of UDMH suspension.The experimental study of UDMH suspension was conducted by an electrorheological test device,and the effects of different electric field intensity and alginic acid medium contents on the electrorheological characteristics of UDMH suspension were analyzed.The results show that,the mass flow rate of suspension decreases with increasing the medium mass fraction within and without electric field,but their variation trend is different.With the increase of the medium mass fraction,the mass flow rate without electric field decreases continuously,while the mass flow rate within electric field tends a fixed value,whose value is affected by the interaction of electric field intensity and medium mass fraction.When the content of alginic acid is30%and the elctric field intensity is2kV·mm-1,the electrorheological effect for the suspension with5%UDMH is the best.The content of UDMH has a great influence on the suspension insulation,and the suspension in which UDMH content is less than15%,can achieve the electrorheological effect.