Research on Influence of Area of Aeration Tunnel in Flood Discharge Tunnel on Air Flow Characteristics in Tunnel
To study the influence of the area of the aeration tunnel in the spillway tunnel on the air flow characteristics inside the tunnel,numerical simulation was used to analyze the influence of the area of aeration tunnel on the air flow field and air velocity.The results are as follows.Increasing the area of aeration tunnel,the average wind speed inside the tun-nel decreases,but the amount of air supplement increases,and the fluidity of the air inside the tunnel can be improved;The change of the area of aeration tunnel has a small impact on the decay law of the air flow velocity above the free surface of the water flow,and only changes the magnitude of the flow velocity;The relationship between the air velocity inside the aeration tunnel and the water flow velocity and the area coefficient(area of the cavity/area of the remaining area of the cave roof)was established and verified by using the prototype observation data at Jinping Level-I Hydropower Station,and the error was less than 10%.The results can be used as a reference for the design of the aeration tunnel in water con-servancy projects.
numerical simulationflood discharge tunnelaeration tunnelremaining space at the top of the tunnelarea coefficient
万方数据
维普
