火箭推进

为了预示嵌金属丝端燃药柱和后翼柱药柱掺混燃烧条件下单室双推力发动机的内弹道性能,首先对高压段和低压段燃烧过程中的复杂燃面变化进行分析,获得不同增速比对应的燃面与基准燃面之间的关系。然后,考虑压强转级对增速比的影响,获得过渡段二者的关系,从而实现了整个燃烧过程增速比的无级变速,进而获得燃面退移规律,据此计算了这种类型装药发动机的内弹道性能。结果表明:计算值与试验曲线吻合良好,计算误差小于5%,证明了计算模型的合理性和程序的可靠性。该方法可用于此类型发动机的内弹道计算与分析。

In order to predict the internal ballistics performance of a single-chamber dual-thrust motor under the mixing combustion condition of end-burning grain with embedded wire and rear wing grain, the changes of complex combustion surface during the combustion process of the high pressure stage and the low pressure stage were first analyzed.The relationship between the combustion surface and the reference combustion surface corresponding to different speed increasing ratio was obtained.Then, considering the effect of pressure transfer on the speed increasing ratio, the relationship between them in the transition stage was obtained.Thereby, its stepless variable speed during the entire combustion process was realized, and the law of burning surface regression was obtained.Accordingly, the internal ballistic performance of this type of motor was calculated.The results show that the calculated values agree well with the experimental curves, and the calculation error is less than 5%, which proves the rationality of the calculation model and the reliability of the program.The method can be used for the internal ballistic calculation and analysis of this type of motor.

引言
1 燃面退移规律分析
2 掺混燃烧下的内弹道计算
3 结论

图1 嵌金属丝的两级药柱模型<br/>Fig.1 Two-stage grain model with embedded wire

图1 嵌金属丝的两级药柱模型
Fig.1 Two-stage grain model with embedded wire

图2 嵌金属丝药柱的燃烧模型<br/>Fig.2 Combustion model of grain with embedded wire

图2 嵌金属丝药柱的燃烧模型
Fig.2 Combustion model of grain with embedded wire

图3 嵌金属丝药柱燃面的退移过程示意图<br/>Fig.3 Schematic diagram of burning surface regression process in the grain with embedded wire

图3 嵌金属丝药柱燃面的退移过程示意图
Fig.3 Schematic diagram of burning surface regression process in the grain with embedded wire

图4 基准模型中金属丝锥角位置示意图<br/>Fig.4 Schematic diagram of cone angle position of wire in benchmark model

图4 基准模型中金属丝锥角位置示意图
Fig.4 Schematic diagram of cone angle position of wire in benchmark model

图5 高压段的燃面和肉厚计算模型<br/>Fig.5 Calculation model of burning surface and thickness in high pressure section

图5 高压段的燃面和肉厚计算模型
Fig.5 Calculation model of burning surface and thickness in high pressure section

图6 过渡段的燃面和肉厚计算模型<br/>Fig.6 Calculation model of burning surface and thickness in transition section

图6 过渡段的燃面和肉厚计算模型
Fig.6 Calculation model of burning surface and thickness in transition section

图7 计算与试验的推力曲线对比<br/>Fig.7 Comparison of calculated and tested thrust curves

图7 计算与试验的推力曲线对比
Fig.7 Comparison of calculated and tested thrust curves

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备注

引言

1 燃面退移规律分析

2 掺混燃烧下的内弹道计算

3 结论

期刊信息