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Turbulence and entrainment in an atmospheric pressure dielectric barrier plasma jet
Plasma Processes and Polymers ( IF 2.9 ) Pub Date : 2019-12-20 , DOI: 10.1002/ppap.201900217 Youssef Morabit 1 , Richard D. Whalley 2 , Eric Robert 3 , Mohammad I. Hasan 1 , James L. Walsh 1
Plasma Processes and Polymers ( IF 2.9 ) Pub Date : 2019-12-20 , DOI: 10.1002/ppap.201900217 Youssef Morabit 1 , Richard D. Whalley 2 , Eric Robert 3 , Mohammad I. Hasan 1 , James L. Walsh 1
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Particle image velocimetry, laser‐induced fluorescence, and computational modeling are used to quantify the impact of plasma generation on air entrainment into a helium plasma jet. It is demonstrated that discharge generation yields a minor increase in the exit velocity of the gas. In contrast, the laminar to turbulent transition point is strongly affected, attributed to an increase in plasma‐induced perturbations within the jet shear layer. The temporal decay of laser‐induced fluorescence from OH is used as an indicator of humid air within the plasma. The results show that plasma‐induced perturbations increase the quenching rate of the OH‐fluorescent state; indicating that shear‐layer instabilities play a major role in determining the physicochemical characteristics of the plasma.
中文翻译：
大气压介质阻挡等离子体射流中的湍流和夹带
粒子图像测速、激光诱导荧光和计算模型用于量化等离子体产生对空气夹带进入氦等离子体射流的影响。结果表明，放电产生使气体的出口速度略有增加。相比之下，层流到湍流的转变点受到强烈影响，这归因于射流剪切层内等离子体引起的扰动的增加。来自 OH 的激光诱导荧光的时间衰减被用作等离子体中潮湿空气的指标。结果表明，等离子体诱导的扰动增加了 OH 荧光态的猝灭率；表明剪切层不稳定性在确定等离子体的物理化学特性方面起着重要作用。
更新日期：2019-12-20
中文翻译：
大气压介质阻挡等离子体射流中的湍流和夹带
粒子图像测速、激光诱导荧光和计算模型用于量化等离子体产生对空气夹带进入氦等离子体射流的影响。结果表明，放电产生使气体的出口速度略有增加。相比之下，层流到湍流的转变点受到强烈影响，这归因于射流剪切层内等离子体引起的扰动的增加。来自 OH 的激光诱导荧光的时间衰减被用作等离子体中潮湿空气的指标。结果表明，等离子体诱导的扰动增加了 OH 荧光态的猝灭率；表明剪切层不稳定性在确定等离子体的物理化学特性方面起着重要作用。
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