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等离子体激励器诱导射流的湍流特性研究

张鑫 黄勇 阳鹏宇 唐坤 李华星

张鑫, 黄勇, 阳鹏宇, 唐坤, 李华星. 等离子体激励器诱导射流的湍流特性研究[J]. 力学学报, 2018, 50(4): 776-786. doi: 10.6052/0459-1879-17-392
引用本文: 张鑫, 黄勇, 阳鹏宇, 唐坤, 李华星. 等离子体激励器诱导射流的湍流特性研究[J]. 力学学报, 2018, 50(4): 776-786. doi: 10.6052/0459-1879-17-392
Zhang Xin, Huang Yong, Yang Pengyu, Tang Kun, Li Huaxing. INVESTIGATION ON THE TURBULENT CHARACTERISTICS OF THE JET INDUCED BY A PLASMA ACTUATOR[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 776-786. doi: 10.6052/0459-1879-17-392
Citation: Zhang Xin, Huang Yong, Yang Pengyu, Tang Kun, Li Huaxing. INVESTIGATION ON THE TURBULENT CHARACTERISTICS OF THE JET INDUCED BY A PLASMA ACTUATOR[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 776-786. doi: 10.6052/0459-1879-17-392

等离子体激励器诱导射流的湍流特性研究

doi: 10.6052/0459-1879-17-392
基金项目: 装备预先研究项目资助(51313010204).
详细信息
    作者简介:

    *张鑫, 助理研究员, 主要研究方向: 等离子体流动控制技术研究. E-mail:lookzx@mail.edu.cn

    通讯作者:

    张鑫

  • 中图分类号: V211;

INVESTIGATION ON THE TURBULENT CHARACTERISTICS OF THE JET INDUCED BY A PLASMA ACTUATOR

  • 摘要: 为了进一步掌握等离子体流动控制机理, 完善等离子体激励器数学模型, 提升等离子体激励器扰动能力, 采用粒子图像测速技术, 在静止空气下开展了介质阻挡放电等离子体激励器诱导射流特性研究. 实验时, 将非对称布局激励器布置在平板模型上, 随后将带有激励器的模型放置在有机玻璃箱内, 从而避免环境气流对测试结果的影响. 基于激励器诱导流场, 分析了激励电压对诱导射流特性的影响, 揭示了较高电压下诱导射流近壁区的拟序结构, 获得了卷起涡、二次涡等拟序结构的演化发展过程, 计算了卷起涡脱落频率, 阐述了卷起涡与启动涡的区别, 初步探索了卷起涡的耗散机制. 结果表明: (1)层流射流不能完全概括等离子体诱导射流特性, 激励电压是影响射流特性的重要参数. 当电压较低时, 诱导射流为层流射流; 当电压较高时, 诱导射流的雷诺数提高, 射流剪切层不稳定, 层流射流逐渐发展为湍流射流. (2)等离子体诱导湍流射流包含着卷起涡、二次涡等拟序结构; 在固定电压下, 这些涡结构存在恒定的卷起频率. (3)当激励电压较高时, 流动不稳定使得卷起涡发生了拉伸、变形, 引起了流场湍动能增大, 从而加速了卷起涡的耗散. 研究结果为全面认识激励器射流特性, 进一步挖掘激励器卷吸掺混能力, 提升激励器控制能力积累基础.

     

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