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首页> 外文会议>AIAA plasmadynamics and lasers conference;International conference on MHD energy conversion;ICMHD >Force Measurement Techniques and Preliminary Results Using Aerogels and Ferroelectrics for Dielectric Barrier Discharge Actuators
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Force Measurement Techniques and Preliminary Results Using Aerogels and Ferroelectrics for Dielectric Barrier Discharge Actuators

机译：气凝胶和铁电体用于介质阻挡放电致动器的力测量技术和初步结果

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This paper presents experiments carried out on dielectric barrier discharge plasma actuators. Two areas concerning these actuators are addressed in this work: First, two different experimental techniques used to measure the induced body force are compared. A high precision force balance is used to make a direct measurement of the thrust produced which is then compared with a control volume analysis on data obtained through particle image velocimetry. For the direct measurements the effect of varying the actuator plate length upon which the induced flow acts is also investigated. The results from these tests show that the length of the actuator plate is most influential at higher voltages with the measured force increasing as much as 20% as the length of the plate is decreased. When the two methods are compared against each other, good agreement is found given that the control volume size has a sufficient downstream extent In the second part of the paper, materials with extreme relative dielectric constants (ε) are investigated for performance. Specifically, the use of silica aerogels (ε ~ 1.1) and ferroelectric dielectrics (ε = 1750) are examined. The silica aerogel was found to have a strong effect on thrust generation as compared to the other dielectrics tested. However, the power supplied to the ferroelectric actuator manifests itself primarily as heat generation with no noticeable thrust measured. Especially due to its minimal actuator weight penalty and higher thrust, actuators made with silica aerogel may be quite useful for practical applications.
机译：本文介绍了在介质阻挡放电等离子体致动器上进行的实验。在这项工作中涉及了与这些致动器有关的两个方面：首先，比较了两种用于测量感应力的不同实验技术。高精度的力平衡用于直接测量产生的推力，然后将其与通过粒子图像测速仪获得的数据的控制量分析进行比较。为了直接测量，还研究了改变致动器板长度的作用，在该致动器板上作用感应流。这些测试的结果表明，执行器板的长度在较高电压下最具影响力，随着测得的力的减小，执行器板的长度会增加多达20％。当将这两种方法相互比较时，假定控制体积的大小具有足够的下游范围，则可以找到很好的一致性。在本文的第二部分中，研究了具有极高相对介电常数（ε）的材料的性能。具体来说，研究了二氧化硅气凝胶（ε〜1.1）和铁电介电体（ε= 1750）的使用。与其他测试的电介质相比，发现二氧化硅气凝胶对推力产生有很强的影响。但是，提供给铁电致动器的功率主要表现为热量的产生，而没有测量到明显的推力。特别是由于其最小的致动器重量损失和更高的推力，用二氧化硅气凝胶制成的致动器对于实际应用可能非常有用。

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