Switching Behavior of a Plasma-Fluidic Actuator
Switching Behavior of a Plasma-Fluidic Actuator
复制标题
等离子体流体致动器的开关行为
DOI：
10.2514/6.2007-785
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
T. McLaughlin
中科院分区：
文献类型：
--
作者：
J. Gregory;Joseph C. Ruotolo;A. Byerley;T. McLaughlin
本文提出了一种新型的等离子体射流执行器。该设备结合了等离子体致动器和流体振荡器的最佳特征，以创建一个致动器，该致动器使致动频率与流速成比例，并克服了等离子体致动器的速度限制。等离子体致动器用于通过在流体振荡器的喷嘴上引起流动不对称来有效地切换柯恩达附接壁之间的高动量射流。以这种方式，该装置有效地用作流体放大器。切换时间，定义为等离子体启动和相对的连接壁之间的切换过程的完成之间的延迟，被用作量化这些新设备的性能的度量。在这些测试中，从等离子体流体致动器发出的射流在短至19 ms的附件壁之间切换。结果表明，切换时间随着等离子体致动器的功率的增加而减小。此外，切换时间随着速度的降低而减少，因为等离子体对主射流具有更大的控制权。这种新的流动控制作动器概念具有应用于推力矢量和喷流混合等领域的潜力。
This work presents the plasma-fluidic actuator as a new type of flow control actuator. The device combines the best features of plasma actuators and fluidic oscillators to create an actuator that decouples the actuation frequency from the flow rate and overcomes the velocity limitations of the plasma actuator. Plasma actuators are used to effectively switch a high momentum jet between Coanda attachment walls by inducing a flow asymmetry across the nozzle of a fluidic oscillator. In this manner the device effectively serves as a fluid amplifier. Switching time, defined as the delay between the plasma initiation and completion of the switching process between opposing attachment walls, is used as a metric to quantify the performance of these new devices. In these tests the jet issuing from the plasma-fluidic actuator was switched between attachment walls in as little as 19 ms. Results indicate that the switching time decreases as the power of the plasma actuator increases. Furthermore, switching times decrease with decreased velocity, as the plasma has more substantial control authority over the primary jet. This new flow control actuator concept has the potential of being used in many applications such as thrust vectoring and jet flow mixing.