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首页> 外文期刊>Acta astronautica >A novel ram-air plasma synthetic jet actuator for near space high-speed flow control
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A novel ram-air plasma synthetic jet actuator for near space high-speed flow control

机译：用于近空间高速流量控制的新型冲压空气等离子体合成射流致动器

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摘要

As a promising high-speed flow control technique, plasma synthetic jet actuator (PSJA) has the superiorities, of requiring no moving parts or flow supplies, extremely fast response, wide frequency band and high efflux speed. However, it has limitations for application: in near space, the air in the cavity which is used to generate the puled plasma jet becomes rare, and the low refill rate often leads to insufficient recovery which limits the working frequency. In order to overcome these limitations, a novel actuator called ram-air plasma synthetic jet actuator (RPSJA) is proposed. Inspired by the ramjet, the principle of this actuator is to take advantage of the tremendous dynamic pressure of the high-speed inflow using an added ram-air inlet. Numerical investigations were conducted to demonstrate the feasibility of such an actuator. The results show that, compared with PSJA, the air in the chamber becomes denser and the refill rate is notably increased owing to the "ram-air effect" of RPSJA. Based on the flow characteristic analysis, a revised actuator with a stepped ram-air inlet is proposed and investigated as well, and the results show that the performance is improved as the stepped height rises.
机译：作为一种有前途的高速流量控制技术，等离子合成射流执行器（PSJA）具有不需要移动部件或流量供应，超快响应，宽频带和高外排速度的优势。但是，它的应用存在局限性：在附近空间中，用于产生脉冲状等离子流的空腔中的空气变得稀少，并且低填充率常常导致回收率不足，从而限制了工作频率。为了克服这些限制，提出了一种新型的作动器，称为冲压空气等离子体合成射流作动器（RPSJA）。受冲压喷气机的启发，该执行器的原理是利用增加的冲压空气入口来利用高速流入的巨大动态压力。进行了数值研究以证明这种致动器的可行性。结果表明，与PSJA相比，由于RPSJA的“冲压空气效应”，腔室内的空气变得更致密，重新填充率显着提高。在流动特性分析的基础上，提出并研究了带有阶梯式冲压空气进气口的改进型执行机构，研究结果表明，随着阶梯式高度的增加，其性能得到改善。

著录项

  • 来源
    《Acta astronautica》 |2017年第4期|95-102|共8页
  • 作者

    Zhou Yan; Xia Zhixun; Luo Zhenbing; Wang Lin; Deng Xiong;

  • 作者单位

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Plasma actuator; Synthetic jet; Near space; High-speed flow control; Ram-air;

    机译：等离子致动器;合成射流;近空间;高速流量控制;Ram-air;

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