Dominant parameters for maximum velocity induced by body-force models for plasma actuators
Dominant parameters for maximum velocity induced by body-force models for plasma actuators
复制标题
等离子体致动器体力模型引起的最大速度的主要参数
DOI：
10.1007/s00162-018-0478-9
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Fujii K.
中科院分区：
文献类型：
--
作者：
Kawai Shigetaka;Bouwhuis Thijs;Abe Yoshiaki;Yakeno Aiko;Nonomura T.;Aono H.;Oyama A.;Hoeijmakers H. W. M.;Fujii K.
本研究旨在探讨等离子体激励器在静止空气中所产生的体积力场与最大速度之间的关系，以建立一个简单的等离子体激励器体积力模型。数值模拟进行了体力附近的墙壁。体积力的空间分布和时间变化分别为高斯分布和稳态驱动。进行量纲分析以根据体积力分布导出参考速度和雷诺数。结果表明，当高斯分布的中心固定在壁面上时，导出的雷诺数与静态条件下诱导的无量纲最大速度具有很好的相关性。此外，两个流态被确定在雷诺数方面。考虑到力场重心的变化，通过引入新的参考长度定义了另一个雷诺数。无量纲最大速度被发现与后者的雷诺数，即，在静态条件下的最大诱导速度是由力场的三个关键参数确定的：每单位时间的总诱导动量，重心的高度，并从它的标准偏差。这种缩放原来是适用于现有的体力模型的等离子体致动器，尽管力的分布不同于高斯分布。速度分布与实验数据的比较验证了结果，并表明，由等离子体激励器诱导的流动可以模拟简单的力分布，通过调整的关键体力参数。
This study investigates the relationship between body-force fields and maximum velocity induced in quiescent air for development of a simple body-force model of a plasma actuator. Numerical simulations are conducted with the body force near a wall. The spatial distribution and temporal variation of the body force are a Gaussian distribution and steady actuation, respectively. The dimensional analysis is performed to derive a reference velocity and Reynolds number based on the body-force distribution. It is found that the derived Reynolds number correlates well with the nondimensional maximum velocity induced in quiescent conditions when the center of the Gaussian distribution is fixed at the wall. Additionally, two flow regimes are identified in terms of the Reynolds number. Considering the variation of the center of gravity of force fields, another Reynolds number is defined by introducing a new reference length. The nondimensional maximum velocity is found to be scaled with the latter Reynolds number, i.e., the maximum induced velocity in quiescent conditions is determined from three key parameters of the force field: the total induced momentum per unit time, the height of the center of gravity, and the standard deviation from it. This scaling turns out to be applicable to existing body-force models of the plasma actuator, despite the force distributions different from the Gaussian distribution. Comparisons of velocity profiles with experimental data validate the results and show that the flow induced by a plasma actuator can be simulated with simple force distributions by adjustment of the key body-force parameters.
DOI：
10.1142/9390
发表时间：
2015
期刊：
International Journal of Control, Automation and Systems
影响因子：
--
作者：
T. Sengupta;S. Lele;K. Sreenivasan;P. Davidson
通讯作者：
P. Davidson
基于离子输运的等离子体致动器的数值模拟
影响因子：
3.2
作者：
Seiya Yamamoto;K. Fukagata
通讯作者：
K. Fukagata