公路隧道排送通风系统升压模式分析研究

基于动量定理及能量守恒定律,推导了公路隧道排、送风升压计算理论公式。并应用数值计算方法求得不同工况下公路隧道排、送风升压值,同时将数值计算结果与理论计算值和规范计算值进行了比较分析。对现行规范排、送风升压计算公式中相关系数进行了修正,并给出了理论合理、形式简单的新的排、送风升压计算公式。相关研究结论可供公路隧道通风设计计算参考。

Study on Pressure Increasing Principle of Highway Tunnel with Exhaust and Blow Ventilation System

Based on theorem of momentum and law of energy conservation,the article deduces the new theoretical formulas for calculating the pressure increasing in highway tunnel with exhaust and blow ventilation system.CFD is applied to compute the pressure increasing under several different conditions.And the CFD computational results are compared with theoretical results and results calculated by the present specifications for Design of ventilation and Lighting of Highway Tunnel(JTJ026.1-1999).Several coefficients of the formulas for calculating the pressure increasing recommended by the present specifications(JTJ026.1-1999)are corrected.New simple and rational formulas are offered.The conclusions could be used as reference for ventilation engineering design.