| 敞口型液体离心喷嘴动态特性数值模拟 |
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| 引用本文： | 富庆飞,杨立军,屈元元,谷彬.敞口型液体离心喷嘴动态特性数值模拟[J].航空动力学报,2010,25(9):2132-2138. |
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| 作者姓名： | 富庆飞 杨立军 屈元元 谷彬 |
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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： | 国家自然科学基金(50406007);北京航空航天大学博士研究生创新基金 |
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| 摘 要： | 从喷嘴动力学理论分析和数值模拟两方面入手,对敞口型离心式喷嘴动力学特性进行了研究.通过对入口处流量施加周期性扰动的办法对喷嘴对于外部扰动的响应特性进行了分析.结果表明:表面波引起旋流腔内液膜厚度发生振荡,进而引起喷嘴出口流量的脉动.而旋转波的频率则较低.喷嘴出口流量脉动与喷嘴压降脉动之间的相位差随着扰动频率的增大而增大,数值模拟结果与线性的喷嘴动力学理论符合较好.
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| 关 键 词： | 液体火箭发动机 喷嘴 动态特性 流量脉动 数值模拟 |
| 收稿时间： | 2009/7/27 0:00:00 |
| 修稿时间： | 2009/12/18 0:00:00 |
Numerical simulation of dynamic characteristics of an open-end swirl injector |
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| FU Qing-fei,YANG Li-jun,QU Yuan-yuan and GU Bin.Numerical simulation of dynamic characteristics of an open-end swirl injector[J].Journal of Aerospace Power,2010,25(9):2132-2138. |
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| Authors: | FU Qing-fei YANG Li-jun QU Yuan-yuan and GU Bin |
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| Institution: | School of Astronautics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China;School of Astronautics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China;School of Astronautics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China;School of Astronautics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China |
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| Abstract: | Theoretical studies and numerical simulation on dynamic characteristics of an open-end swirl injector were performed.The response of the injector flow to external excitations was investigated by superimposing periodical oscillation of flow-rate at the inlet.The numerical simulation results show that the surface wave causes oscillation of the liquid film in the swirl chamber,and then the flow oscillation occurs at the spout.Moreover,the frequency of the vortex wave is much smaller.The phase angle between the flow oscillation at spout and the pressure drop oscillation is proportional to the oscillation frequency,which agrees well with the linear injector dynamic characteristics theory. |
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| Keywords: | liquid rocket engine injector dynamic characteristics flow pulsation numerical simulation |
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