自能式SF_6断路器小电流开断过程中气流特性的数值分析

Numerical Analysis of Gas Flow Property in the Auto-Expansion Type SF_6 Circuit Breaker during the Small Current Interruption

采用改进型流体网格法(FLIC法)及移动网格技术，结合145kV自能式SF_6断路器灭弧室结构模型，通过求解柱坐标下的轴对称暂态二维欧拉方程组，完成自能式SF_6断路器小电流开断过程中灭弧室内气流特性的数值计算，并对气流特性的分布情况进行了分析。

Employing modified fluid-in-cell method and movable mesh technique, the paper has calculated the gas flow properties in the chamber of the 145kV auto-expansion type SF 6 circuit breaker during the small curren t interruption. Finally, this thesis has computed the effect of the chamber stru cture to the gas flow properties.