基于CFD技术的地铁站台火灾通风模式优化

Optimization of ventilation mode for subway platform fire based on CFD

为了优化地铁站台火灾通风系统,应用标准κ?ε双方程模型湍流模型,建立人员安全疏散判定条件和通风方案优化控制模式;对比无火源状态下的速度实测值和模拟值,结果显示,所建立的数学模型是可靠的;实例分析结果表明所建立的基于CFD技术的地铁站台火灾通风系统优化模式在工程应用上是可行的。该结果对地铁站台火灾通风模式合理性的评价及优化提供了理论依据。

3D numerical simulation is carried out for subway platform fire by applying standard turbulence κ-ε double equations model, the standard of personnel safety evacuation is made and the optimal control model of ventilation pattern is set up. The math model is verified through comparing simulating results of velocity parameters with measured results on non-fire state. Simulating result of ventilation pattern is analyzed and adjusted by example until it satisfies the standard of personnel safety evacuation. The research result can offer the reference to the estimation and optimization of ventilation pattern for subway platform fire.