中文摘要：

为有效控制喷口区域气流运动、提高高压开关开断能力,以高压SF6断路器（HV SF6 CB）为研究对象,在喷口上游平直段构造＂X＂形导流片结构,使气流形成涡旋运动产生能量分离,气流产生径向动能交换以调控断口区域气流温度梯度。建立550 k V SF6断路器灭弧系统3维气流场物理数学模型,采用有限体积法研究容性小电流开断下,喷口上游＂X＂型导流片对灭弧室内气流参数的影响。结果表明,有导流片结构灭弧室断口区域内的气流呈组合涡运动形式,沿壁面周向呈大旋转曲率强旋运动,轴中心气流折返,断口区域温度降低,产生了能量分离效应。

英文摘要：

In order to effectively control the gas flow movement in vent area and to improve the breaking performance of high voltage switchgear, taking the high voltage SF6 circuit breaker （HV SF6 CB） as the research object, we proposed a novel axial vortex chamber structure with an X-shaped guide blade constructed at the nozzle to exchange the energy of the turbulent gas flow in the radial direction in order to control the gas flow temperature gradient. Then we built a 3D flow field physical and mathematical model of the arc quenching system in 550 kV SF6 CB, and analyzed the influence of the X guide blade at nozzle upstream on the field flow parameters in arc quenching chamber with small capacitive current interruption using the finite volume method. The results show that the flow motion along the wall circumference presents combination vortex with large rotation curvature, thus, flow moves in completely opposite directions and creates the energy separation phenomenon, and the temperature reduces between the contacts.