一种仿真SF_(6)断路器灭弧室气流场的新方法

New method to simulate the airflow field of SF_(6)circuit breaker

本文提出基于格子Boltzmann方法的一种仿真SF_(6)断路器开断过程的新方法。以252 kV压气式SF_(6)断路器为研究对象,建立灭弧室气流场格子Boltzmann方程,推导出气流场的格子Boltzmann模型。通过耦合触头机械运动的开断过程,仿真得到灭弧室内气流场的变化规律,将喷口上游和喉部的压力变化曲线与试验结果对比,二者有较好的一致性。结果表明,格子Boltzmann方法可以用于研究SF_(6)断路器开断过程气流场的演变过程。

This paper presents a new method for simulating the breaking process of SF_(6)circuit breaker based on lattice Boltzmann method.Taking the 252kV gas-filled SF_(6)circuit breaker as the research object,the lattice Boltzmann equation of the gas flow field in the arc-extinguishing chamber is established,and the lattice Boltzmann model of the gas flow field is derived.Through the coupling process of the mechanical movement of the contact,the variation of the airflow field in the arc extinguishing chamber is simulated,and the pressure change curve upstream of the nozzle and the throat is compared with the test results.The two have good consistency.The results show that the lattice Boltzmann method can be used to study the evolution of the airflow field during the SF_(6)circuit breaker breaking process.