中文摘要：

火灾时的烟气控制在隧道防火安全设计中占有很重要的位置，为此通过1／20小尺寸模型实验和全尺寸现场试验对水平隧道火灾通风纵向临界风速进行了研究。根据隧道全尺寸试验和小尺寸实验研究结果，并结合Jae等的小尺寸实验结果以及胡隆华的全尺寸试验和数值模拟结果，建立了水平隧道火灾通风纵向临界风速的预测模型。将模型得到的预测结果跟基于气体火源的实验结果进行对比，结果表明Wu和Barker通过气体火源小尺寸实验所建立的模型预测值偏低。

英文摘要：

1/20 scale model test and full scale field test were carried out to study the critical velocity for fire ventilation in horizontal tunnels. Combined with the test results, small-scale test results by Jae and fullscale test and simulation by Hu, a semi-empirical model was developed to predict the longitudinal critical velocity for tunnel fire ventilation. Compared with the predictions of the proposed model and other models using air as fire source, it was found that the predictions by Wu and Barker was underestimates.