嵌银丝低易损推进剂增速比和综合燃速试验研究

Experimental Research on Speed Increasing Ratio and Comprehensive Burning Rate of Low Vulnerable Propellants Embedded with Silver Wire

关键词:  固体火箭发动机  低易损推进剂  嵌银丝  增速比  燃速  药条试验

Key words:  Solid rocket motor  Low vulnerable propellants  Embedded with silver wire  Speed increasing ratio  Burning rate  Propellant strip test

摘要:

针对嵌银丝端羟基聚醚（HTPE）低易损推进剂的复杂燃烧过程，采用水下声发射法对增速比和综合燃速随基础燃速、压强、银丝直径及温度的变化规律开展试验研究。结果显示，低压下推进剂的综合燃速随基础燃速的增大整体呈上升趋势，而增速比呈下降趋势；综合燃速随压强的增大呈上升趋势，增速比高压段低于低压段，平均值相差24%；推进剂增速比随银丝直径增大先增大后减小，存在一个最佳银丝直径为0.25mm，使得增速比最大；综合燃速和增速比随推进剂的温度增加呈上升趋势。

Abstract:

Aiming at the complex combustion process of HTPE low vulnerable propellants embedded with silver wire， the underwater acoustic emission method was used to conduct experimental research on the variety of speed increasing ratio and comprehensive burning rate with basic burning rate， pressure， silver wire diameter and temperature. The results show that the comprehensive burning rate of the propellant at low pressure increases with the increase of the base burning rate， while the speed increasing ratio decreases. The comprehensive burning rate increases with the increase of pressure， and the speed increasing ratio of high pressure is lower than that of low pressure， and the average difference is 24%. With the increase of the silver wire diameter， the speed increasing ratio first increases and then decreases. There is an optimal diameter of 0.25mm to maximize the speed increasing ratio. The comprehensive burning rate and speed increasing ratio increase with the increase of propellant temperature.