凝胶推进剂直圆管流动特性探讨

分析了非牛顿流体的类型,认为在液体火箭发动机中有应用前景的凝胶推进剂类型应是有屈服应力的牛顿流体或者幂律流体,关键在于胶凝剂。研究了直圆管中凝胶推进剂的流动特性,依据剪切速率可以将凝胶推进剂在直圆管中的流动分为三个区域。在第二流动区中,可以用幂律流体推导的流阻方程计算管路流阻;在第三流动区,可以近似用牛顿流体流阻方程计算流阻。

Discussion on gelled propellant fluid characteristics in straight round pipe

The rheological characteristics and classification of non-newtonian fluid were discussed.The newtonian fluid with yield stress and power-law model fluid have application potential in liquid rocket engines.The key to produce the applicable gelled propellant is the gellant.On the basis of gelled propellant fluid property research,the gelled propellant fluid in straight round pipe can be regarded as composition of three areas by different shear rates.The pressure loss of pipe within the second fluid area can be calculated by the equation deduced from power law model.The loss in the third fluid area can be calculated approximately by the newtonian fluid pressure loss equation.