Abstract:The flow filed model of cutter-suction was established according to the structure and working principle of cutting head.The characteristic of flow filed was researched by utilizing Computational fluid dynamics theory and Fluent simulation software.The law of flow field and velocity field and The change law of solid volume fraction of outlet was analysed. The main working parameters(speed of cutter and velocity of sucker mouth) which effected cutter-suction capacity was simulated in detail. The relationship between the parameters and the cutter-suction capacity was obtained. Increasing the cutter-suction flow is beneficial to the improvement of the cutter-suction capacity,when the cutter-suction flow over 2000m3/h,continue to increase the cutter-suction flow leads to high velocity of solid phase in the pipeline,and increase wear between solid particles and pipes;When the speed of cutter below 20r/min,increasing the speed of cutter is beneficial to the improvement of the cutter-suction capacity; When the speed of cutter over 20r/min, continue to increase speed of cutter will reduce the cutter-suction capacity significantly.
