论文部分内容阅读
本文评述了七种经验比冲预测方法,其中包括赫格里斯提出的一种新方法。利用所有经验方法,包括赫格里斯发动机优化程序在内的经验方法,评定了赫格里斯发动机,并作了比较。計算结果表明,除SEA法外,其他所有方法给出的比冲平均误差均小于1％。而赫格里斯新方法给出的比冲最精确。本文还给出了固体发动机性能程序(SPP)的理论分析同经验方法計算结果的比较。比较表明,对该发动机数据库来说,经验方法比冲的平均误差与分析方法相当。但经验方法的际准差较大。
This article reviews seven empirical methods of specific impulse prediction, including a new method proposed by Hurgus. Using all empirical methods, including empirical methods such as the Hoghris engine optimization program, the Hegloss engine was assessed and compared. The calculation results show that the average error of specific impulse except for the SEA method is less than 1%. The new method of Hegrisi gives the most accurate impulse. The paper also gives a comparison between the theoretical analysis of the SPP and the empirical results. The comparison shows that, for this engine database, the empirical method is comparable to the average error of impulse analysis methods. However, the empirical method of the larger standard deviation.