公路隧道通风弯道设计优化研究

发布时间：2018-05-18 00:29

本文选题：通风 + 弯曲风道　；参考：《地下空间与工程学报》2014年02期

【摘要】：在长大公路隧道通风系统中,经常涉及到设置导流叶片的弯曲风道。本文首先对隧道通风系统弯道局部效应进行了探讨,继而采用有限元数值模拟方法系统研究了角度分别为30°、60°、90°的弯曲风道及含同心圆型、翼形、107°薄圆形、95°薄圆形导流叶片直角弯曲风道的局部阻力损失系数,并将其计算结果与经验公式进行对比验证,在此基础上对公路隧道通风弯道设计参数进行了进一步优化研究。研究结果表明:(1)直弯风道内局部阻力损失系数与所设置的导流叶片类型及直弯参数(r/D)密切相关,不同类型导流叶片的设置只有对应特定的直弯参数(r/D)才能达到较好的导流效果;(2)采用角度为80°的弯曲风道取代设置导流叶片的直弯风道完全可行。
[Abstract]:In the ventilation system of long road tunnel, the curved air passage with guide blade is often involved. In this paper, the local effect of bends in tunnel ventilation system is discussed at first, and then the bending duct with angle of 30 掳~ 60 掳~ 90 掳and concentric circular type are studied systematically by using finite element numerical simulation method. The local resistance loss coefficient of the right angle bend duct of the airfoil is 107 掳thin circular and 95 掳thin circular guide vane, and the calculated results are compared with the empirical formula. On this basis, the design parameters of ventilation bend of highway tunnel are further optimized. The results show that the local drag loss coefficient in the straight wind duct is closely related to the type of the guide blade and the straight bend parameter (r / D). For different types of guide vane, it is feasible to use a curved duct with an angle of 80 掳instead of a straight curved duct with a specific straight bend parameter (r / D) to achieve a better diversion effect.
【作者单位】：长安大学;新疆交通规划勘察设计研究院;温州市铁路与轨道交通投资集团有限公司;
【基金】：交通部西部建设科技项目(2013 318 802 400)
【分类号】：U453.5

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