| 化学激光器用文氏咀流场特性的数值模拟 |
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| 引用本文： | 靳冬欢,刘文广,陈星,陆启生,赵伊君.化学激光器用文氏咀流场特性的数值模拟[J].强激光与粒子束,2011,23(5). |
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| 作者姓名： | 靳冬欢 刘文广 陈星 陆启生 赵伊君 |
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| 作者单位： | 国防科学技术大学 光电科学与工程学院, 长沙 410073 |
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| 摘 要： | 基于现有的文氏咀流量供给管道，提取出轴对称2维计算模型，计算了不同背压下文氏咀及下游管道的流场特性。计算结果显示，随着背压的升高，激波在管道内经历了3种状态，在直管道内为斜激波，到转接段时为拟正激波，进入文氏咀后则为正激波。在进行文氏咀流量计的设计时，应尽量将正激波控制在文氏咀喉道或向下游延伸的一小段距离内，此时是文氏咀的最佳工作状态。另外，采用壁面开孔法在文氏咀下游选取测压点时，为了准确测量截面上的静压，应将测压点选取在距离直管道入口数倍管径处，一般不低于8倍管径。
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| 关 键 词： | 化学激光器 文氏咀 数值模拟 激波 |
| 收稿时间： | 1900-01-01; |
Numerical study of flow field characteristics of Venturi nozzle for chemical laser |
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| Jin Donghuan,Liu Wenguang,Chen Xing,Lu Qisheng,Zhao Yijun.Numerical study of flow field characteristics of Venturi nozzle for chemical laser[J].High Power Laser and Particle Beams,2011,23(5). |
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| Authors: | Jin Donghuan Liu Wenguang Chen Xing Lu Qisheng Zhao Yijun |
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| Institution: | (College of Opto-Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China) |
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| Abstract: | Based on the existing Venturi nozzle fluid supply system,an axisymmetric two-dimension computation model was presented.Flow field characteristics of Venturi nozzle under different back pressures were calculated using computational fluid dynamic methods.The numerical simulations demonstrate that,shock waves in the pipeline go through three states owing to back pressure's increasing: oblique shock wave in straight circular pipeline,pseudo-normal shock wave in endocone adapter connector,and normal shock wave i... |
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| Keywords: | chemical laser Venturi nozzle numerical simulation shock wave |
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