Abstract: This paper briefly evaluates the several prediction methods for solid rocket motor specific impulse used in foreign and our countries. According to Landsba-um method,a empirical parameter correlation formula for predicting specific impulse efficiency has heen derived from the statistic of high-altitude-simulation test data of different 44 solid rocket motors in America and China.This method has the advantages of both accuracy and simplicity, and can be used for the preliminary performance evaluation and the optimization design of a solid rocket motor.

Key words: Specific thrust;Solid rocket engine;Prediction;Empirical equation

摘要： 本文简要地评述了国内外固体火箭发动机比冲预示方法.在Landsbaum法的基础上,根据国内外44种不同类型的发动机地面和高空模拟热试车试验统计,利用多维回归分析方法,得出了适合于国内发动机的经验比冲效率参数相关法.这种方法的优点是比冲预示结果比较准确,方法简单,利用袖珍式计算器可快速计算,对固体发动机总体方案论证及性能最优化设计是很有用的.

关键词: 比推力;固体火箭发动机;预测;经验方程