提高固体火箭发动机性能的技术途径

TECHNOLOGY METHODS TO IMPROVE SOLID ROCKET MOTOR PERFORMANCES

关键词:  固体推进剂火箭发动机  推进剂质量比  比冲  推进剂药柱

Key words:  Solid propellant rocket engine  Propellant mass ratio  Specific impulse  Propellant grain

摘要:

用固体发动机比冲的理论计算方法计算了发动机比冲与平均工作任强的关系。由发动机质量比的表达式，推出了质量比与发动机最大工作压强和平均工作压强比以及药柱体积装填分数的关系。计算和试验结果表明：发动机比冲随着平均工作压强增加而增加；发动机质量比随着药柱体积装填分数增加以及最大压强和平均坛强比的减小而增加。结论：提高平均压强和药柱装填分数以及降低最大压强与平均压强比是提高发动机性能的技术途径。

Abstract:

The relation between motor specific impulse and average operating pressure is. calculated by using the theoretic calculating method of motor specific impulse. The relation between propellant-to-motor mass ratio and maximum operating pressure-to-average operating pressure ratio and grain volumetric loading fraction is inferred from the formula of propellant-to-motor mass ratio’ It is shown by predication and tests that motor specific impulse rises with increase of average operating pressure and the propellant-to-motor mass ratio rises with the increase of grain volumetric loading fraction and the decrease of maximum pressure-to-average pressure ratio.