A Parametric Experimental Study for Momentum Transfer by Plasma Actuator
A Parametric Experimental Study for Momentum Transfer by Plasma Actuator
复制标题
等离子体驱动器动量传递的参数化实验研究
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Nobara Kimura
中科院分区：
文献类型：
--
作者：
T. Abe;Y. Takizawa;S. Sato;Nobara Kimura
实验研究了各种参数对等离子体激励器的动量传递性能的影响，包括环境气体压力、环境气体种类、交流高压波形、电极结构和介质板材料。研究发现，等离子体激励器工作的环境气体压力对动量传递性能有显著影响。事实上，性能并不是随着环境气体压力的降低而线性下降，而是先增加后减少。这表明，控制动量传递性能的放电方式在很大程度上取决于环境气体压力。环境气体中的化学成分对动量传递性能也有显著影响，在整个压力范围内，空气中的动量传递大于氮气中的动量传递。这表明空气中的氧分子有很大的贡献。在小于1atm的整个压力范围内，二氧化碳气体中的动量传递性能略大于氮气中的动量传递性能，而在压力为1atm时，两者的动量传递性能相当。研究还发现，高电压的波形对动量传递有显著影响：1)高压波上行部分越陡，动量传递越大；2)正弦波的正负部分都是净动量传递的基础，对动量传递有显著贡献。此外，电极的结构也是影响等离子体激励器动量传递性能的一个因素。特别是，网状电极可以显著提高性能。最后阐明了介质板材料对动量传递性能的影响，动量传递依赖于介质板材料对环境气体压力的影响。
Momentum transfer performance of the plasma actuator was investigated experimentally for a variety of parameters including an ambient gas pressure, ambient gas species, alternating high voltage wave form, electrode configuration and dielectric plate material. It was found that an ambient gas pressure, under which a plasma actuator operates, has a significant effect on the momentum transfer performance. In fact, the performance does not decrease in a liner manner with decreasing an ambient gas pressure, but increases at first and then decreases. This suggests that the discharge manner, which governs the momentum transfer performance, significantly depends on the ambient gas pressure. Chemical species of an ambient gas has also a significant effect on the momentum transfer performance; The momentum transfer in air is larger than that in nitrogen gas over an entire pressure range less than 1 atm. This suggests a significant contribution of oxygen molecule in air. The momentum transfer performance in carbon dioxide gas is slightly larger than that in nitrogen gas over an entire pressure range less than 1 atm while they are comparable at a pressure of 1 atm. It was also found that the wave form of the high voltage has a significant effect; 1) the steeper the up-going part of the high voltage wave is, the larger the momentum transfer is, 2) both negative and positive part of the sinusoidal wave equivalently are foundamental for the net momentum trasfer and have a significant contribution to the momentum transfer. Furthermore the configuration of electrode were found to be an effective factor for the momentum transfer performance in a plasma actuator. Especially, a mesh type electrode can improve the performance significantly. Finally we clarified the effect of the material of the dielectric plate on the momentum transfer performance; The momentum transfer depends on the dielectric plate material in a manner depending on the ambient gas pressure.