【作者】 王晓玲； 陈红超； 杨丽丽；

【Author】 Wang Xiaoling~1 Chen Hongchao~1 Yang Lili~1 (School of Environment Science and Engineering,Tianjin University,Tianjin,300072,China,

【机构】 天津大学环境科学与工程学院；

【摘要】 考虑长距离压入式通风沿程漏风量对隧洞内风流的影响,建立了独头掘进引水长隧洞通风三维 K-ε重整化(RNG)数学模型。以新疆八十一大坂引水隧洞 TBM 施工通风为例,研究了风管和洞内风压、风速的分布,揭示了漏风率沿程分布规律,得到了漏风率与压力之间的关系,分析了漏风口处风流和紊流动能分布,模拟结果表明:风管内风压风速、漏风率均沿程逐渐降低;沿程洞内风压逐渐升高,洞内风速则逐渐降低。漏风口附近紊流动能较大,洞内紊流动能较小。结合 Nakayama 通风模型试验进行验证,模拟结果与实测结果基本一致。更多还原

【Abstract】 A three-dimensional RNG k-εmodel was set up for forced ventilation in leading face of the long diversion tunnel,considering the effect of leaky ventilation.Leading face of TBM construction in the long diversion tunnel of Xinjiang eighty-one Daban was taken as a case.The distributions of wind pressure and the velocity in the ventilation duct and tunnel were discussed.The air leak rate was re- vealed along the diversion tunnel and the relation between the air leak rate and wind pressure was ob- tained.The distribution of the airflow field and turbulence kinetic energy around the air leak ventage. The results show that the wind pressure,velocity and air leak rate gradually reduce along the tunnel, and the wind pressure in the tunnel is increased along with the distance from the outlet of the tunnel, while the velocity is reduced.The turbulent kinetic energy is relatively larger near the ventage,and it is smaller in the tunnel.The simulated results were well in agreement with the experimental work by Na- kayama on a scale ventilation model.更多还原