甲基肼凝胶推进剂粘弹性能分析
Study on Viscoelastic Characterization of Monmethyl Hydrazine Gel Propellant

用流变仪对某配方甲基肼凝胶推进剂的粘弹性进行了研究，表明甲基肼凝胶推进剂的粘弹性随温度、频率、预剪切应力等发生变化。在固定振荡频率改变剪切应力的情况下，胶体体系弹性成份均占主导地位，增加剪切应力能使弹性模量增加，但对粘性模量影响不明显。增加振荡频率，粘弹性模量均随着增加，但是弹性模量增加速率超过粘性模量增加速率；与此同时，体系的贮能粘度与动态粘度均随着下降并趋于相等。温度升高使粘弹性模量同时下降，但相位角随温度变化不大。
The viscoelastic characterization of monmethyl hydrazine gel propellant was tested by using rheometer. The results showed that the viscoelastic characterization of monmethyl hydrazine gel propellant was affected by temperature, stear stress and frequency. On a certain frequency, elastic factors were dominant; with the increasing of stear stress, the elastic module became stronger but the viscosity changed unconspicuous. Increasing frequency, both of viscosity mod-ule and elastic module grown, but the growing of elastic module was more fleetly; on the other hand, the storage viscosity and dynamic viscosity fell to be close. High temperature fell viscoe-lastic module, but affected phase angle inapparently.