综合管廊通风方式研究

Study on Ventilation Mode of Comprehensive Utility Tunnel

应用流体模拟软件Fluent,对综合管廊燃气舱燃气泄漏扩散进行数值模拟,讨论不同通风方式下对燃气扩散过程的影响。分析得出:管廊日常通风时,综合管廊各舱室应保持负压状态,自然进风、机械排风为合理的通风方式;管廊事故通风时,燃气舱一旦发生泄漏,需尽快排除有害气体,机械进风、机械排风为合理的通风方式;在进行模拟时,不同的通风方式,设置的边界条件不同,模拟结果也有所不同。

The fluid simulation software Fluent is used to simulate the gas leakage and diffusion in the gas pipelines of the utility tunnel. This paper discusses the influence of different ventilation modes on gas diffusion process. It is concluded that the cabins of the utility tunnel should be kept in a negative pressure state during daily ventilation. Natural air intake and mechanical exhaust are reasonable ventilation modes. Harmful gases should be removed as soon as possible when ventilation accidents occur in utility tunnel. Mechanical intake and mechanical exhaust are reasonable ventilation modes. During the simulation, different ventilation modes and boundary conditions are set up, and the simulation results are also different..