| 引用本文: | 赵文涛,周进,聂万胜,等.液体火箭发动机燃烧不稳定性分析与热释放声放大机理.[J].国防科技大学学报,1997,19(2):10-14.[点击复制] |
| Zhao Wentao,Zhou Jin,Nie Wansheng,et al.Combustion Instability of the Liquid Rocket Engine and the Mechanism of Sound Amplification by Heat Release[J].Journal of National University of Defense Technology,1997,19(2):10-14[点击复制] |
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| 液体火箭发动机燃烧不稳定性分析与热释放声放大机理 |
| 赵文涛1, 周进1, 聂万胜2, 庄逢辰2 |
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(1.国防科技大学 航天技术系 湖南 长沙 410073;2.国防科工委指挥技术学院 北京 101407)
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| 摘要: |
| 应用计算流体动力学方法对液体火箭发动机燃烧室内高频不稳定燃烧现象进行了数值仿真。气相方程用欧拉坐标系下的Navier-Stokes 方程组描述, 液相控制方程用Lagrangian 坐标系下进行描述, 湍流模型采用高雷诺数的κ-ε双方程模型。在燃烧室内加入正弦形脉冲扰动评定燃烧稳定性。引用Rayleigh 热释放声放大机理对计算结果进行了分析, 并对不同的扰动系数和液滴初始直径描出了燃烧稳定性极限图。 |
| 关键词: 燃烧不稳定性, Rayleigh 准则, 液体火箭发动机 |
| DOI： |
| 投稿日期：1996-10-03 |
| 基金项目: |
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| Combustion Instability of the Liquid Rocket Engine and the Mechanism of Sound Amplification by Heat Release |
| Zhao Wentao1, Zhou Jin1, Nie Wansheng2, Zhuang Fengchen2 |
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(1.Department of Aerospace Technology, NUDT, Changsha, 410073;2.Institute of Command Technology COSTIND, Beijing, 101407)
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| Abstract: |
| high frequency instability in liquid rocket engine is simulated by the method of computational fluid dynamics. The gas controlling equations are described under the Euler coordinate. The liquid phase controlling equations are described under the Lagrangian coordinate. The turbulence model is κ-ε model of high Reynolds number. To assess the combustion instability, the sinusoidal pulse is put into the combustor. The calculated results are observed by the way of Rayleigh mechanism of sound amplification by heat release. The curve of combustion stability is plotted to various perturbation and initial droplet diameter. |
| Keywords: combustion instability, rayleigh criterion, liquid rocket engine |
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