| 环境压强对气动塞式喷管底部压强的影响 |
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| 引用本文： | 李军伟,刘宇.环境压强对气动塞式喷管底部压强的影响[J].北京航空航天大学学报,2003,29(8):663-667. |
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| 作者姓名： | 李军伟 刘宇 |
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| 作者单位： | 北京航空航天大学 宇航学院, 北京 100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划);863-2-3-4-10; |
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| 摘 要： | 为了了解环境压强对塞式喷管底部压强的影响,利用隐式NND格式(Non-oscillation, No free coefficients Dissipative scheme)求解二维层流N-S方程,计算了在没有底部二次流和二次流质量流率为1.4%的情况下,不同环境压强时的底部压强.结果表明,随着环境压强的升高,底部压强也在增加,但在闭尾迹时增加缓慢,在开尾迹时,增加迅速,并可能出现波动.
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| 关 键 词： | 火箭发动机 塞式喷管 底部压强 数值计算 |
| 文章编号： | 1001-5965(2003)08-0663-05 |
| 收稿时间： | 2002-06-28 |
| 修稿时间： | 2002年6月28日 |
Influence of ambient pressure on aerospike nozzle base pressure |
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| Li Junwei,Liu Yu.Influence of ambient pressure on aerospike nozzle base pressure[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(8):663-667. |
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| Authors: | Li Junwei Liu Yu |
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| Institution: | School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | In order to understand the influence of ambient pressure on aerospike nozzle base pressure, the implicit NND(non-oscillation, no free coefficients dissipative) scheme was employed to solve 2-D laminar N-S equations. Aerospike nozzle flow fields under different C NPR (i.e. nozzle pressure ratio) without base secondary flow and with secondary flow of 1.4% mass flux rate were obtained. The result shows that with the increase of ambient pressure, base pressure also increases. But under closed wake, the increase is slow; under open wake, the increase is rapid and even the pressure fluctuates. |
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| Keywords: | rocket engines plug nozzles base pressure numerical computation |
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