Numeration Simulation Of The Inner Flow Field In A Screw Centrifugal Pump

Centrifugal slurry pump is widely used in water conservancy, metallurgy, chemical engineering and electric power industry etc. It is used to deliver the fluid of high density which is formed by solid-liquid mixed. The design of the slurry pump usually based on the work condition of delivering water,which lead to the low operational efficiency, high noise and heavy concentrated wear, lead to largely waste of the energy and equipment, so it is very important to know about the flowing distributions. Experiment is the most direct and trusty, but the investment is very large, the period is very long. The analyzing ability on the flowing fields and the remote flow structures will also be restricted. But use the CFD software to simulate the Inner Flow Field cast lowly and it can reflect the distribution of the inner Flow Field correctly and directly.In this paper, the entity model of Centrifugal slurry pump is generated and meshed, use the more mature k-εmodel to enclose derivation the N-S equation. Adopt the limited volume method to the enclose equations set, press amendment use the SIMPLE algorithm. Five different flux,five different grain sizes,five different inlet initial solid phase consistency and five rotate speed have simulated in this paper by using FLUENT software, have been pumping the pressure distribution,velocity distribution, solid-phase concentration distribution and other important information.According to simulating the flow field in screw centrifugal pump, we get the distributions of velocity, pressure and volume fraction in screw centrifugal pump, Then, analyzing datum in a detailed way, we find out some factors affecting the performance of screw centrifugal pump, offer necessary references to improve on the type of vanes and improve the whole efficiency. The results of research offers reliable information to improve the pump' performance, and offer some theory to design the screw centrifugal pump.