论文标题
涡流环驱动夹带并在火花放电引起的流动中冷却
Vortex rings drive entrainment and cooling in flow induced by a spark discharge
论文作者
论文摘要
火花等离子体排放诱导涡流环和热气内核。我们开发了一个模型来描述火花感应流动的后期以及涡旋环在冷环境中的夹带和热气核的冷却中的作用。使用同时立体粒子图像速度法（S-PIV）和面向背景的Schlieren（BOS）获得的密度和速度测量值在血浆诱导的流中进行测试。我们表明，热核的空间分布遵循涡旋环的运动，其径向膨胀随火花放电期间沉积的电能而增加。 Vortex环冷却模型确定了对流冷却方案中的夹带是由涡流环引起的，并控制了热气组的冷却，并且冷却速率随火花放电期间沉积的电能而增加。
Spark plasma discharges induce vortex rings and a hot gas kernel. We develop a model to describe the late stage of the spark induced flow and the role of the vortex rings in the entrainment of cold ambient gas and the cooling of the hot gas kernel. The model is tested in a plasma-induced flow, using density and velocity measurements obtained from simultaneous stereoscopic particle image velocimetry (S-PIV) and background oriented schlieren (BOS). We show that the spatial distribution of the hot kernel follows the motion of the vortex rings, whose radial expansion increases with the electrical energy deposited during the spark discharge. The vortex ring cooling model establishes that entrainment in the convective cooling regime is induced by the vortex rings and governs the cooling of the hot gas kernel, and the rate of cooling increases with the electrical energy deposited during the spark discharge.
