An Analysis of the Below-standard Installation of the Centrifugal Pump′s Suction Pipe of the Large Cable Car for Water-intake in the Three Gorges Reservoir

To study the centrifugal pump problem caused by below-standard installation of the large diameter suction pipe,various visualization experiments are conducted to analyze the law of gas-liquid two phase flow in the suction pipe. It shows that since the suction pipe is not straight,gases are locked in the pipe by liquids. Thus,the key to solving this problem is making the pipe a vacuum. With high position and strong pressure of the locked gases,a simply device is created to make the pipe a vacuum. The findings can revise the relevant design specification,and be a good reference for similar projects.