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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0.33m/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。
The similarity criterion of natural ventilation in shaft-type highway tunnel is obtained by dimensional analysis method. The approximate simulation method was used to test the unidirectional vehicle movement in 1:10 scale model tunnel. The test shows that the minimum wind speed required to enter the self-mold zone is 0.33 m / s and the three effective vehicle conditions that satisfy the minimum wind speed requirement are f0.8vt1.6, f0.8vt2 and f1.3vt2. Through the comparison between the test data and the theoretical calculation results, the correctness of the criterion is verified.