秦岭终南山隧道然风通风利用计算与仿真.pdf

Calculation and Simulation of Natural Ventilation in QinLing ZhongNanShan Tunnel A Dissertation Submitted for the Degree of Master Candidate: Sun Yuhuan Supervisor: Prof.Qiu Yanzhang Chang’an University, Xi’an, China 万方数据 万方数据 摘要 本文以采用竖井纵向分段式机械通风的秦岭终南山特长公路隧道作为研究对象，对 隧道自然风通风利用进行了计算与仿真，并验证了隧道自然风通风的可行性。 对隧道通风系统进行了一元流通风假设，流体具有不可压缩性、稳定流体、服从连 续性定律、遵循能量守恒定律。根据秦岭终南山隧道的实际交通情况，对目前隧道实际 所需的通风需风量进行了研究和计算；对影响隧道自然风通风的各个因素——湿度、压 强、温度等进行了逐一分析，给出湿度、压强、温度各影响因素下隧道自然风通风的计 算公式；建立秦岭终南山公路隧道自然风通风模型，仿真并分析了开启竖井、关闭竖井 时秦岭终南山隧道在湿度、压强、温度等影响因素下自然风通风的变化规律，并对开启 竖井、关闭竖井时隧道自然风通风风量进行了对比研究。 以秦岭终南山隧道为依托，设计了两种隧道自然风通风方案：隧道双洞循环自然风 通风方案和开启竖井通风隧道自然风通风方案，并对两种自然风通风方案的可行性进行 了分析研究。计算隧道自然风通风风速结合实测隧道内空气质量和通风耗能数据，综合 评价这两种隧道自然风通风方案，验证了秦岭特长公路隧道自然风通风利用可行性，实 现隧道的节能可持续发展。 关键词：特长公路隧道； 自然风通风； CFD i 万方数据 Abstract In this thesis, QinLing ZhongNanShan tunnel is used as study object, the tunnel natural ventilation is calculated and simulated in order to prove the natural ventilation，s feasibility. In the tunnel ventilation system, a hypothesis is maked, the fluid have incompressibility, reliability, continuity, law of conservation of energy, at the same time, based on the tunnel ventilation calculation formula and combined the actual traffic conditions, the fresh air required to tunnel can be worked out at the present stage; secondly the influence factors of natural ventilation is analyzed such as humidity, pressure and temperature, and the tunnel ventilation calculation formulas under each factors is gived, according to the real tunnel conditions establishes three-dimensional model, the laws for