火箭推进

某型膨胀循环发动机在研制初期基于环境压力可能对膨胀循环发动机起动加速性有较大影响的考虑,采用了全程主动引射高空模拟试验方案,试验结果显示环境压力对发动机起动加速性的影响较小。发动机室压和喷管面积比是影响引射方式的主要参数,该型膨胀循环发动机与采用被动引射的某型燃气发生器循环发动机参数相当,这为该型膨胀循环发动机采用被动引射提供了可能,并对膨胀循环发动机采用被动引射高空模拟试验方案的可行性进行仿真研究。

Based on the principal that the starting acceleration performance of an expand cycle engine was possibly affected by the ambient pressure in its developing beginning phase,a test scheme of the positive ejection altitude simulation was selected.The test results show that the ambient pressure affects the starting acceleration performance slightly,the chamber pressure and nozzle area ratio of the expand cycle engine are the main parameters affecting the ejection form,and the parameters of a certain gas generator cycle engine with passive ejection are quite same as that of the expand cycle engine,which provide a possible selection for the expand cycle engine to adopt the passive ejection form.Therefore,the feasibility research on the passive ejection altitude simulation test scheme for the expand cycle engine is carried out in this paper.

引言
1 被动引射系统的工作原理
2 膨胀循环发动机被动引射试验方案
3 结论

图1 两种引射形式的高空模拟试验系统示意图<br/>Fig.1 Schematic diagram of two altitude simulation test systemswith different ejection forms

图1 两种引射形式的高空模拟试验系统示意图
Fig.1 Schematic diagram of two altitude simulation test systemswith different ejection forms

图2 被动引射系统工作原理示意图<br/>Fig.2 Schematic diagram for operating principle of passive ejection system

图2 被动引射系统工作原理示意图
Fig.2 Schematic diagram for operating principle of passive ejection system

图3 发动机真空舱压力随室压变化的试验和仿真曲线<br/>Fig.3 Variation of pressure in engine vacuum cabin with chamber pressure for test

图3 发动机真空舱压力随室压变化的试验和仿真曲线
Fig.3 Variation of pressure in engine vacuum cabin with chamber pressure for test

图4 发动机起动过程中被动引射系统内温度和马赫数分布<br/>Fig.4 Distribution of temperature and Mach number in passive ejection system in process of engine start-up

图4 发动机起动过程中被动引射系统内温度和马赫数分布
Fig.4 Distribution of temperature and Mach number in passive ejection system in process of engine start-up

图5 膨胀循环发动机起动过程中(0～0.9 s)被动引射系统内温度和马赫数分布<br/>Fig.5 Distribution of temperature and Mach number in passive ejection system after expand cycle

图5 膨胀循环发动机起动过程中(0～0.9 s)被动引射系统内温度和马赫数分布
Fig.5 Distribution of temperature and Mach number in passive ejection system after expand cycle

图6 膨胀循环发动机起动过程中(1.0～1.9 s)被动引射系统内温度和马赫数分布<br/>Fig.6 Distribution of temperature and Mach number in passive ejection system after expand cycle engine start-up(1.0～1.9 s)

图6 膨胀循环发动机起动过程中(1.0～1.9 s)被动引射系统内温度和马赫数分布
Fig.6 Distribution of temperature and Mach number in passive ejection system after expand cycle engine start-up(1.0～1.9 s)

图7 主级工作段被动引射系统内Ma数分布<br/>Fig.7 Distribution of Mach number in passive ejection system in main working section

图7 主级工作段被动引射系统内Ma数分布
Fig.7 Distribution of Mach number in passive ejection system in main working section

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备注

引言

1 被动引射系统的工作原理

2 膨胀循环发动机被动引射试验方案

3 结论

期刊信息