自能式断路器灭弧室气流场计算的一种新思路

自能式断路器灭弧室存在着压气室、膨胀室、喷口、动触头、静触头等复杂结构，而且多为不规则形状，使得要准确地对灭弧室的结构建立几何模型是一件比较困难的事情。而几何建模的准确与否关系到能否生成高质量的网格，网格生成技术又是得到精确结果的关键技术之一。所以，针对复杂的几何形状建模困难的情况，该文采用区域扩充法利用PHOENICS计算流体力学软件与自编程相结合的方式对自能式断路器灭弧室内喷口部分的气流场进行了计算，并与其他计算方法取得的结果做了比较，结果证明文中所尝试的方法是有效可行的，为自能式断路器灭弧室气流场的计算提供了一种新思路。

A NEW APPROACH TO THE COMPUTATION OF GAS FLOW FIELD IN THE ARC-QUENCHING CHAMBER OF SELF-BLASTING CIRCUIT BREAKER

There are some complex structures in the arc-quenching chamber of the self-blasting circuit breaker, such as compressing chamber, expanding chamber, nozzle, moving contact, solid contact and so on .These structures are not in regular shape, so it is difficult to build geometry model well. However, creating grid is the key technique to get the exact results. Under such condition, the method of computing region expansion is adopted and the software PHOENICS used to compute the fluid field are incorporated with the self-programmed method to compute the gas flow in the arc-quenching chamber of the self-blasting circuit breaker. The results are compared with another results which are gotten by the other method, it shows the method is good and feasible. And also it provides a new approach to the computation of the gas flow field in the arc-quenching chamber.