The Numerical Simulation And Separation Properties Study Of New-style Hydrocyclone Based On FLUENT

Water resource in Chongqing is abundant, which provides good natural resource to application of surface water source heat pump (SWHP) in Chongqing. However, sand contents have largely over SWHP's demand according to analyzing the water quality in the Yangtze River. All the other water quality indexes can meet the demands of SWHP. Therefore the problem of sand contents must be solved if Yangtze River in Chongqing area is used as cooling and heating source for SWHP.In this dissertation investigation an efficient and cost competitive new style hydrocyclone by simulation methods is utilize to solve the problem that Yangtze River in Chongqing area during summer season is high in fine sand and can not proper to be source of SWHP.This paper constructed turbulence model of liquid-solid flow based on analyzing and studying the separation theory of hydrocyclone. Using numerical simulation method to conduct the distribution characteristics of tangential velocity, axial velocity,radial velocity,static pressure and dynamic pressure. The moving behavior of solid particles in the hydrocyclone , which is used to do analyze so as to find the interaction between moving behavior of particles and the field, was stimulated by application of the stochastic model of interaction with continuous phase elementarily. How inlet velocity, sand concentration, sand density, diameter of column section, overflow pipe, entrance structure and cone structure influence the separation function were studied by numerical simulation experiments.Based on comparing and analyzing the results of simulation, a new type hydrocyclone with higher separating efficiency was designed and proved to be feasible. The entrance section of this structure is 10 degrees from the horizontal with inserted a central bar 400mm long and six inclined boards on the wall of the outflow pipe( length, width , thickness : 80mm, 7.5mm, 1mm), the inclined boards were vertical along outflow directions. Under the condition of the best inlet velocity 15m/s, volume fraction of sand 10%, the separation efficiency of the new style hydrocyclone raised to 60% and the outflow produce capacity raised to 20m3/h。...