Aiming at the problem of long period of pipeline water filling,on the basis of comparing the coincidence degree between simulation data and experimental data,pipeline three-dimensional models with five kinds of different incli-nation angles were established to simulate the process of pipeline water filling.The changes of internal velocity,pressure and gas-liquid two-phase distribution were analyzed.The results show that when the inclination of the pipeline is less than 30°,the flow pattern is stable,the streamline is uniform,the water level in the pipe rises uniformly,and the average fill-ing velocity is 1.3 m/s.With the increase of inclination,the velocity becomes faster and faster,and the phenomenon of gas-liquid two-phase mixed flow is more and more obvious.When the inclination angle is 60°,there is a phenomenon of gas congestion in the pipeline.Based on the comprehensive comparison,it is suggested that the filling speed of the pipe-line can be increased and the filling period can be shortened when the inclination is less than 30°.
pipeline water fillingwater-air two-phase flowthree-dimensional numerical simulationinclined pipeline
维普
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