障碍物地形条件下重气泄漏扩散实验的CFD模拟验证

Simulation and verification of CFD on dispersion of heavy gas leakage in obstacle terrain

重气泄漏扩散是一种危害性较大的多发事故,而一旦在人口密集区域发生泄漏事故,周围居民将处境危险。重气泄漏后一般沿地面扩散,而地形条件是影响其扩散行为的重要因素。本文利用计算流体力学方法(CFD)对Thorney Island Trial026实验条件进行了数值模拟,考察障碍物对气体扩散的影响并与实验结果进行对比。结果表明,模拟结果与实验数据的吻合性较好,证明CFD软件能够较准确地模拟障碍物地形条件下的重气扩散过程。

Release of heavy gas,which generally diffuses along the ground and is affected by terrain condition,is a harmful and frequent accident.Once a hazard gas leak accident occurs in the crowded region,the periphery peoples will face with danger.The method based on Computational Fluid Dynamics （CFD） was used to simulate Thorney Island Trial 026 in this paper and the impact of obstacles on the gas diffusion was studied.The simulation result of Thorney Island Trial 026 was compared with that of experiment,which indicated that the dispersion of heavy gas in obstacle terrain can be simulated accurately by CFD.