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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Experimental method to quantify the efficiency of the first two operational stages of nanosecond dielectric barrier discharge plasma actuators
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Experimental method to quantify the efficiency of the first two operational stages of nanosecond dielectric barrier discharge plasma actuators

机译：量化纳秒介质阻挡放电等离子体致动器前两个工作阶段效率的实验方法

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摘要

A method to quantify the efficiency of the first two operational stages of a nanosecond dielectric barrier discharge (ns-DBD) plasma actuator is proposed. The method is based on the independent measurements of the energy of electrical pulses and the useful part of the energy which heats up the gas in the discharge region. Energy input is calculated via a back current shunt technique as the difference between the energy given and the energy reflected back. The ratio of the difference of the latter two quantities and the energy input gives the electrical efficiency (eta(E)) of a ns-DBD. The extent of the energy deposited is estimated via Schlieren visualizations and infrared thermography measurements. Then, the ideal power flux obtained if all the inputted energy was converted into heat is calculated. Transient surface temperature was measured via infrared thermography and used to solve a 1D inverse heat transfer problem in a direction normal to the surface. It gives as output the actual power flux. The estimated ratio between the two power fluxes represents a quantification of the mechanical fluid efficiency (eta(FM)) of a ns-DBD plasma actuator. Results show an inverse proportionality between eta(E), and eta(FM), and the thickness of the barrier. The efficiency of the first two operational stages of a ns-DBD is further defined as. eta= eta(E) center dot eta(FM).
机译：提出了一种量化纳秒电介质势垒放电（ns-DBD）等离子体致动器前两个操作阶段效率的方法。该方法基于电脉冲能量和加热放电区域中气体的能量的有用部分的独立测量。能量输入通过反向电流分流技术计算为给定能量与反射回能量之间的差。后两个量之差与能量输入之比得出ns-DBD的电效率（eta（E））。沉积的能量范围通过Schlieren可视化和红外热像仪测量进行估算。然后，计算如果所有输入的能量都转换为热量所获得的理想功率通量。瞬态表面温度通过红外热像仪测量，用于解决垂直于表面方向的一维逆向传热问题。它给出实际功率通量作为输出。两个功率通量之间的估计比率表示ns-DBD等离子体致动器的机械流体效率（eta（FM））的量化。结果显示eta（E）和eta（FM）与势垒厚度之间成反比。 ns-DBD的前两个操作阶段的效率进一步定义为。 eta = eta（E）中心点eta（FM）。

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