竖井型公路隧道自然通风过程的实验研究
Experimental study of natural ventilation for road tunnels with shafts
摘要：
采用量纲分析法得到竖井型公路隧道自然通风相似性准则。采用近似模拟的方法，在1∶10缩尺模型隧道内进行了车辆单向运动实验。测试表明，进入自模区所要求的最小风速为0.33 m/s，达到最小风速要求的3种有效车况为f0.8vt1.6，f0.8vt2和f1.3vt2。通过量纲一化的测试数据与理论计算结果的比较，验证了准则的正确性。
关键词：隧道,自然通风,相似理论,模型实验,风速
Abstract：
Obtains a similarity criterion for natural ventilation in road tunnels with shafts by a dimensional analysis. With approximate modeling method, carries out experiments with unidirectional-moving vehicles in a 1∶10 scale model tunnel. Testing results indicate that the required minimum air velocity is 0.33m/s for the self-simulating zone, and three effective vehicle-conditions are f0.8vt1.6, f0.8vt2 and f1.3vt2 for the minimum air velocity. Verifies the similarity criterion by comparing the dimensionless tested data with dimensionless theoretical results.
Keywords:tunnel, natural ventilation, similarity theory, model experiment, air velocity