| 零二次流引射器启动性能数值研究 |
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| 引用本文： | 许灵芝,徐旭.零二次流引射器启动性能数值研究[J].推进技术,2010,31(2):204-209,225. |
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| 作者姓名： | 许灵芝 徐旭 |
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| 作者单位： | 北京航空航天大学,宇航学院,北京,100191 |
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| 基金项目： | “九八五”工程资助项目(BHA985-2-1) |
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| 摘 要： | 为研究零二次流引射器结构参数如何影响其启动性能,采用数值方法模拟求解了引射器流场,并分析了引射器从启动到不启动的典型工作状态。结果表明:扩压器入口面积与引射喷管喉部面积之比Ad/At和第二喉道收缩比Ast/Ad是影响引射器性能的首要因素,其次是第二喉道长径比Lst/Dst和第二喉道入口的位置Ld/Dd。Ad/At越大,扩压器入口斜激波越强,总压损失越大,临界启动压比越大,越难以启动;Ast/Ad越小(大于其临界收缩比)则临界启动压比越小,越易于启动。
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| 关 键 词： | 引射器+ 引射喷管 结构参数 启动性能+ 压力恢复 数值仿真 |
Numerical investigation on starting performance of zero-secondary flow ejectors |
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| XU Ling-zhi and XU Xu.Numerical investigation on starting performance of zero-secondary flow ejectors[J].Journal of Propulsion Technology,2010,31(2):204-209,225. |
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| Authors: | XU Ling-zhi and XU Xu |
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| Institution: | XU Ling-zhi,XU Xu(School of Astronautics,Beijing Univ. of Aeronautics , Astronautics,Beijing 100191,China) |
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| Abstract: | To investigate how the geometry parameters can influence starting performance in zero-secondary flow ejector,flow field of different ejectors were solved by CFD. The numerical simulation results were also applied to analyze ejector typical operation modes,ranging from on-design to off-design point. Results suggest that Ad/A t (area ratio of diffuser entrance to nozzle throat) and A st /A d (second-throat contraction ratio) are the most important parameters on the ejector performance,and L st /D st (ratio of... |
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| Keywords: | Ejector+ Shrouded nozzle Structure parameter Starting performance+ Pressure recovery Numerical simulation |
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