固体火箭发动机内弹道性能预估方法的研究

 本文介绍两种预估固体火箭发动机内弹道性能的计算方法,重点介绍时-空交替计算方法。为了进行装药计算,采用了作者提出的二维装药通用计算程序,因此使得本文所介绍的内弹道性能预估方法具有通用性。以上计算方法已统一编制成计算机程序,并对三台不同的固体火箭发动机进行了验算,计算结果与试验结果相符合。

STUDY ON ALGORITHMS FOR PREDICTION OF SOLID PROPELLANT ROCKET MOTOR PERFORMANCE

Two algorithms for prediction of solid propellant rocket motor performance are introduced. Triple Loop Iteration Algorithm is applied to solution of quasi-steady equations（ 5 ）-（ 8 ）. Its computer program comprises a procedure with three iterative loops. Time-Space Alternate Algorithm can be applied to soluting both quasi-steady equations and unsteady equations （22）-（24）. If ρ/t, v/t, p/t in equations （22）-（24） are given, equations （22）-（24） will be reduced to ordinary differential equations. They can be solved by Merson's method. When △ρ/△t, △v/△t, △p/△t are approximated to ρ/t, v/t, p/t, this algorithm for model equationcorresponds to the finite difference schemeIt is an unconditionally stable scheme.A general two-dimensional grain calculation method is introduced for calculation of grain. A comprehensive computer program for above mentioned methods has been written and applied to calculating the performance of three different motors. The results of the numerical examples are consistent with the experimental data.