Experimental Study on Stepless Speed Regulation Control of Sectional Cascade Tunnel Ventilation

In order to study the eff ectiveness of cascade ventilation, a 50 m-length tunnel model was made, and the speed control test of zone cascade ventilation was carried out, the results show that the tunnel zone cascade ventilation theory and corresponding principles have good reliability and feasibility; the partitioned cascade method has good ventilation effect, the control system has good operability, and the stepless regulation can achieve the eff ect of high effi ciency and energy saving.