The Prandtl mixing length theory was corrected and redefi ned and the distribution function of air velocity in tunnel derived by the autho r, and the function is used as a theoretical foundation to study ventilation proc ess in tunnel.

• 笔者修正并重新定义了普朗特混合长度理论,推导出巷道中风流速度的分布函数,并将该函数用作研究巷道通风过程的理论基础。