地下水电站出线竖井中SF6泄露扩散的数值模拟分析

摘要

地下水电站出线竖井的GIL电缆有SF6重气泄漏的可能性，需要对竖井内的通风系统和气体扩散进行研究。分析SF6重气泄漏扩散的原理和物理过程，应用CFD数值模拟方法，对竖井内的SF6重气扩散规律进行研究与分析。分析格栅结构和不同泄漏量条件下，SF6的浓度分布及扩散情况，为此类水电站通风系统设计提供借鉴与参考。%GIL has the possibility of SF6 gas leakage in the shaft of underground hydropower station,need to analyze the shaft ventilation system and gas diffusion. Using CFD numerical simulation method to analyze SF6 gas leakage principle and physical process and diffusion law. Analysis of SF6 concentration distribution and diffusion under grilling structure and different leakage conditions, it offer reference for the ventilation system design of hydropower station.