| H-S管激励振荡流动的数值模拟及实验研究 |
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| 引用本文： | 顾声龙,陈立红,张新宇.H-S管激励振荡流动的数值模拟及实验研究[J].实验流体力学,2009,23(4). |
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| 作者姓名： | 顾声龙 陈立红 张新宇 |
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| 作者单位： | 中国科学院力学研究所高温气体动力学实验室,北京,100190 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | Hartmann-Sprenger(H-S)管在一定条件下,可以使射流气体产生按一定频率激励的强烈振荡.对H-S管的振荡流动进行了数值模拟和实验研究.数值模拟结果显示出H-S管在吞吐模式下流场的周期变化,在对应的试验瞬态纹影图上,则观察到相应的吞吐射流气体,揭示了H-S管激励的工作机理.通过大量的实验研究,对小管径共振管的频率估算公式进行了修正,提高了振荡频率估算的准确度,为以后设计给定激励频率的射流喷嘴奠定了基础.
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| 关 键 词： | 射流 H-S管 激励频率 数值模拟 |
Numerical simulation and experimental investigation of excited oscillation in a H-S tube |
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| GU Sheng-long,CHEN Li-hong,ZHANG Xin-yu.Numerical simulation and experimental investigation of excited oscillation in a H-S tube[J].Experiments and Measur in Fluid Mechanics,2009,23(4). |
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| Authors: | GU Sheng-long CHEN Li-hong ZHANG Xin-yu |
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| Institution: | GU Sheng-long,CHEN Li-hong,ZHANG Xin-yu(Lab.of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China) |
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| Abstract: | Under some certain conditions in Hartmann-Sprenger (H-S) tube there can be resulted in intense jet oscillation at a specified frequency.The oscillation flow in the H-S tube was investigated numerically and experimentally.The numerical simulation results indicate the periodical changes of the flow field while the transient schlieren images of the corresponding case show the taking-in jet and the taking-out shock wave.Those results reveal the mechanism of the excited oscillation in the H-S tube.Based on the experimental data,the expression for estimating the oscillation frequency in the small-diameter case was modified which can help to design the jet nozzle at a given excitation frequency. |
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| Keywords: | jet H-S tube excited frequency numerical simulation |
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