公路隧道双洞互补式通风系统横通道角度研究

依托某公路隧道研究通风横通道角度对双洞互补式通风系统的影响。通过数值模拟,分析不同角度工况下分流3通与汇流3通因阻力损失不同而引起的送风量差别,提出联络风道中汇流3通因阻力损失是确定横通道角度的关键。计算表明,在通风风速较大时,随横通道角度的减小,汇流3通段阻力损失会急剧变大;横通道角度为60°时,有利于通风网络的气流组织。

Research on Angles of Transverse Passageways for Twin - hole Compensatory Ventilation System of Highway Tunnels

Based on the research on the influences of the angles of transverse ventilating passageways on twin -hole compensatory ventilation system of some highway tunnel, this paper analyzes difference of air output caused by different resistance losses of shunting three passageways and converging three passageways under the working conditions of different angles, puts forward that the resistance loss of converging three passageways in contact air channels is the key of determining the angles of transverse passageways. Computation slows that when the ventilating speed is larger, the resistance loss of converging section of three pas- sageways will abruptly increase with decrease of the angles of transverse passages. The air flow organization favorable for ventilation network is obtained when the angle of transverse passageways is 60°.