超声速气流下纳秒脉冲放电实验研究
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空军工程大学等离子体实验室

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O351.3;TP602

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Experimental Investigation on Nanosecond Pulsed Discharge under Supersonic flow
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    磁流体动力技术的应用可以革命性的提升高超声速飞行器的性能,其应用的前提是超声速气流具有一定的电导率,分析表明冷态高超声速气流的电离必须考虑采用非平衡电离方式。本文设计吸气式Ma3的超声速风洞,采用纳秒脉冲电离方式电离气体,研究了静止条件下和Ma3气流下等离子体的空间放电特性。实验结果表明:超声速气流下的放电的击穿电压约为2.88kV,高于静止条件下的1.85kV;当正向峰值电压约为4kV时,超声速气流下单次脉冲放电过程中注入流场的能量约为15.6mJ,高于静止条件下的8.58mJ;超声速气流下的放电较为稳定,且频率越高,放电越均匀,随着放电电压的升高,放电呈现明显的丝状。超声速气流下要实现空间均匀等离子的产生,需要较低的气压以及高性能的纳秒脉冲电源。

    Abstract:

    The performance of the hypersonic flight vehicle could be revolutionarily promoted by the application of the MHD technology, which require the conductivity of the supersonic speed airflow as the premise condition, with precedential analysis having indicated that Non-equilibrium ionization mode should be considered into the ionization of the low temperature supersonic speed airflow. The air-breathing Ma3 supersonic wind tunnel was designed in this paper, with space-discharge characteristics of the plasma investigated under static condition and Ma3 airflow. The experimental result indicated that, when the device discharged in supersonic airflow, the breakdown voltage reached about 2.88kV, which is obviously higher than parallel 1.85kV under static condition, and when the peak forward voltage was about 4kV in a supersonic airflow, about15.6mJ of the energy, that is higher than parallel 8.58mJ of energy released under static condition, was released into the flow field in a single pulsed discharge, with the discharge in supersonic airflow relatively steady, more even as the frequency grew, and appearing to be threadlike as the discharged voltage grew. To obtain the spacially homogeneous plasma in supersonic airflow, a relatively low pressure and high-performance nanosecond pulse power supply are both needed.

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引用本文

张杨. 超声速气流下纳秒脉冲放电实验研究[J]. 科学技术与工程, 2013, 13(35): .
zhangyang. Experimental Investigation on Nanosecond Pulsed Discharge under Supersonic flow[J]. Science Technology and Engineering,2013,13(35).

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历史
  • 收稿日期:2013-07-05
  • 最后修改日期:2013-08-02
  • 录用日期:2013-08-02
  • 在线发布日期: 2013-12-20
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