Simulation of Computation and Experimental Investigations about Water Hammer in High Lift Water Transmission Pipeline

For the study on water hammer protection problems of long distance, high lift and a pressurization hoisting for long distance water supply system, the paper analyzes a long distance water transmission system whose high lift is up to 2100 meters by a pressurization hoisting in southwest china. The water hammer protection model is established for high lift and long distance water transmission pipeline based on fluid mechanics, and the solution of decision model is attained by Bentley Hammer software. Then, a comparative analysis on the hydraulic characteristics is elaborated based the model solution whether the pipeline is under the prevention measure or not. The experimental results show that the damage of pump-stopping water hammer is more serious and the water column separation phenomenon probably happens without the prevention measure. When the pipeline is installed a comprehensive water hammer device with the two stage of rapid butterfly check valve and air valve, it can effectively prevent the accidental caused by pump-stopping reverse, the damage of pump-stopping water hammer and the water column separation, and ensure the safe and stable operation of the pipeline.