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首页> 外文期刊>The Aeronautical Journal >Jet thrust vectoring using a miniature fluidic oscillator
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Jet thrust vectoring using a miniature fluidic oscillator

机译：使用微型流体振荡器进行射流推力矢量化

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This paper presents a new approach to vectoring jet thrust using a miniature fluidic actuator that provided spatially distributed mass addition. The fluidic actuators used had no moving parts and produced oscillatory flow with a square wave form at frequencies up to 1·6kHz. A subsonic jet with an exit diameter of 3·81cm was controlled using single and dual fluidic actuators, each with an equivalent circular diameter of 1·06mm. The fluidic nozzle was operated at pressures between 20·68 and 165·47kPa. The objectives of the present work included documentation of the actuation characteristics of fluidic devices, assessment of the effectiveness of fluidic devices for jet thrust vectoring, and evaluation of mass flow requirements for vectoring under various conditions. Measurements were made in the flow field using a pitot probe for the vectored and un-vectored cases. Some acoustic measurements were made using microphones in the near-field and for selected cases particle image velocimetry (PIV) measurements were made. Thrust vectoring was obtained in low speed jets by momentum effects with fluidic device mass flow rates of only 2 x 10~(-4)kg/sec (0·6% of main jet mass flow per fluidic oscillator). Although a single fluidic device produced vectoring of the primary jet, the dual fluidic device configuration (with two fluidic devices on either side of the jet exit) produced mass flux enhancement of 28% with no vectoring. Our results indicate that fluidic actuators have the potential for use in thrust vectoring, flow mixing and industrial flow deflection applications.
机译：本文提出了一种使用微型流体执行器来矢量化射流推力的新方法，该执行器提供了空间分布的质量增加。所使用的流体执行器没有活动部件，并且在频率高达1·6kHz时产生方波形式的振荡流。使用单个和双重流体致动器控制出口直径为3·81cm的亚音速喷射器，每个致动器的等效圆直径为1·06mm。流体喷嘴的工作压力为20·68至165·47kPa。本工作的目的包括记录流体装置的驱动特性，评估流体装置对射流推力矢量的有效性以及评估在各种条件下进行矢量的质量流量要求。使用皮托管探针在有载体和无载体情况下在流场中进行测量。在近场中使用麦克风进行了一些声学测量，并针对特定情况进行了颗粒图像测速（PIV）测量。在低速射流中，通过动量效应获得了推力矢量，射流装置的质量流量仅为2 x 10〜（-4）kg / sec（每个射流振荡器的主射流质量流量的0·6％）。尽管单个流体装置产生了主射流的矢量，但双流体装置配置（射流出口的两侧都有两个流体装置）在没有矢量的情况下产生了28％的质量通量增强。我们的结果表明，流体执行器具有用于推力矢量，流量混合和工业流量偏转应用的潜力。

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