火箭推进

开展了气氧/煤油富燃燃气发生器在混合比0.25～0.50、室压1.0～4.0 MPa范围内的燃烧试验,获得了混合比和室压对发生器碳烟生成及沉积特性的影响规律。试验表明,在本研究范围内,富燃燃气发生器内的燃烧未达到化学平衡状态。当混合比小于0.4时,积碳量随混合比的增大略有增加,但均不明显; 当混合比大于0.4时,积碳量显著增加。在室压1.0～4.0 MPa范围内,室压对碳烟的生成具有重要影响,并存在一个介于1.0～2.0 MPa之间的临界压力,当室压低于此临界压力时,燃烧过程中无碳烟生成。

A series of combustion experiments were carried out using a fuel-rich GOX/kerosene gas generator,at mixture ratios from 0.25 to 0.50 and chamber pressures from 1.0 to 4.0 MPa. The effects of mixture ratio and chamber pressure on soot formation and deposition characteristics were obtained. The results showed that the state of chemical equilibrium was not attained in the combustion process. When mixture ratio is smaller than 0.4,soot deposition is not significant and increases with the increase of mixture ratio slightly; when mixture ratio is larger than 0.4,soot deposition increases remarkably. At chamber pressure from 1.0 to 4.0 MPa,soot formation is found to be strongly dependent on chamber pressure. There is a critical pressure for soot formation which is between 1.0～2.0 MPa. If chamber pressure is smaller than the critical pressure,there is no soot formation in the combustion.

引言
1 试验装置与试验工况
2 试验结果与分析
3 结论

图1 富燃燃气发生器结构示意图<br/>Fig.1 Schematic of the fuel-rich gas generator system

图1 富燃燃气发生器结构示意图
Fig.1 Schematic of the fuel-rich gas generator system

表1 混合比影响试验工况表<br/>Tab.1 Operating conditions of Test I

表1 混合比影响试验工况表
Tab.1 Operating conditions of Test I

表2 室压影响试验工况表<br/>Tab.2 Operating conditions of Test II

表2 室压影响试验工况表
Tab.2 Operating conditions of Test II

图2 混合比影响试验尾气照片<br/>Fig.2 Plume photos of Test_I

图2 混合比影响试验尾气照片
Fig.2 Plume photos of Test_I

图3 涡轮叶片模拟件试后照片<br/>Fig.3 Turbine simulator post test

图3 涡轮叶片模拟件试后照片
Fig.3 Turbine simulator post test

图4 涡轮叶片模拟件积碳质量测量值和燃气中碳烟摩尔分数预测值随混合比的变化<br/>Fig.4 Mass of soot deposited in turbine simulator and mass of soot predictions vs. K

图4 涡轮叶片模拟件积碳质量测量值和燃气中碳烟摩尔分数预测值随混合比的变化
Fig.4 Mass of soot deposited in turbine simulator and mass of soot predictions vs. K

图5 室压影响试验尾气照片<br/>Fig.5 Plume photos of Test_II

图5 室压影响试验尾气照片
Fig.5 Plume photos of Test_II

图6 涡轮叶片模拟件积碳量随室压的变化<br/>Fig.6 Mass of soot deposited in turbine simulator vs. pc

图6 涡轮叶片模拟件积碳量随室压的变化
Fig.6 Mass of soot deposited in turbine simulator vs. pc

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备注

引言

1 试验装置与试验工况

2 试验结果与分析

3 结论

期刊信息