Research on Pulse Plasma Jet with Turbulent Flow

在这一年里，我们最初的目标是完成脉冲射流的数值模拟，并利用激光诱导预解离荧光（LIPF）方法分析脉冲等离子体射流辅助点火现象。在一个10*10*10cm^3的燃烧容器中，甲烷与空气混合，在脉冲等离子体射流的辅助下，得到了氢氧根点火瞬间预解离分子的舒伦图和二维分布。这些图片解释脉冲喷射点火过程如下；在脉冲喷射点火器内部产生的火焰通过一个孔口向主燃烧室传播并被区分，相反，分布在主室的OH自由基像火一样诱导点火。虽然其他科学家已经从理论上预测了这些点火过程，但我们在世界上第一次成功地通过实验捕捉到了这一现象。

In this year, we initially aimed at finishing the numerical simulation of a pulse jet flow, and at analyzing a pulse-plasma-jet assisted ignition phenomena by using a LIPF (Laser Induced Pre-dissociation Fluorescence) method. As a result, we have got the Shurilen pictures and a two-dimensional distribution of pre-dissociating OH molecules in the instant of the ignition assisted by a pulse-plasma jet in a 10*10*10cm^3 combustion container, in which methane and air are premixed.These pictures explain the pulse-jet ignition processes as follows ; The flame originated inside the pulse-jet ignitor travels through an orifice toward a main combustor and is distinguished, and instead, the OH radicals distributed in the main chamber induce ignition like a fire work.Although these ignition processeshave been theoretically predicted by other scientists, we have succeeded to catch the phenomena experimentally for the first time in the world.