Underwater plasma generating device

A plasma generating device includes a hollow inner electrode into which an active gas is injected, an outer dielectric surrounding the inner electrode and including a plurality of pores, a coating surrounding the outer dielectric and including a plurality of fine pores, and a power source supplying power to the inner electrode, the injected source gas discharges in a space between the internal electrode and the external dielectric to generate plasma, and the plasma is discharged through the plurality of pores of the external dielectric and the plurality of pores of the coating layer. 一种等离子体产生装置包括其中被注入有源气体的中空内部电极、围绕所述内部电极并包括多个孔的外部电介质、围绕所述外部电介质并包括多个细孔的涂层、以及向所述内部电极供电的电源，其中，被注入的源气体在所述内部电极与所述外部电介质之间的空间中放电以产生等离子体，并且所述等离子体通过所述外部电介质的多个细孔和所述涂层的多个细孔排出。