Numeration Simulation Of The Flow Field In A Centrifugal Slurry Pump

Centrifugal slurry pump is widely used in water conservation, metallurgy, chemical engineering and electric power industry. 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 κ-ε model to enclose derivation the N-S equation .adopt the limited volume method to the enclose equations set ,press amendment use the SIMPLE algorithm. Six different grain sizes and five different inlet initial solid phase consistency have simulated in this paper by using FLUENT software.Analysed the influence on the solid granulation to the distribution of pressure field and velocity field under different grain size and solid phase density; analyzed which effect to the wear of volute and impeller; studied the reason of the impeller channel's axial vortices that near to the shear part and the influence to the pressure field; studied the solid grain's influence to the pump's efficiency and head.. Introduced the work principle of the slurry pump's back impeller and analyzed its influence to the pump's performance.Generalize the distribution Centrifugal slurry pump's solid phase density, it can appropriately explanation for the slurry pump's wear phenomenon,, it can offer some reference information to the improvement of slurry pump's antifraying nature and optimum design.