振动轴转速对双卧轴振动搅拌流场的影响

Effect of Shaft Rotating Speed on Vibration Mixing Flow Field of Two-bedroom Shaft

为研究双卧轴振动搅拌机搅拌筒内流场振动搅拌过程中固液混合流体瞬态流动情况,基于计算流体力学(CFD)提供的计算方法,结合动网格技术、欧拉多相流模型、Realizable k-ε湍流模型及离散相模型,采用C语言编写用户自定义程序(UDF),并将其动态链接到CFD中,在非稳态条件下数值模拟双卧轴振动搅拌机搅拌质量受振动轴转速、固相颗粒体积分数的影响规律,并在此基础上,进行了振动搅拌试验研究。结果表明:当搅拌轴转速为35 r/min、混合料颗粒体积分数为20%、颗粒直径分别为10 mm、20 mm和30 mm时,振动轴转速分别为960 r/min、1460 r/min和1800 r/min时其搅拌质量最佳;数值分析结果与试验结论基本一致,说明了数值计算结果的准确性和计算方法的可行性。

In order to study the transient flow of solid-liquid mixed fluid during the vibration stirring process of the flow field in the mixing cylinder of the two-bedroom shaft vibration mixer,based on the calculation method of computational fluid mechanics(CFD),combined with dynamic mesh technology,Euler multiphase phase flow model,realizable k-εturbulence model and discrete phase model,the user-defined program(UDF)is developed using C language,and linked dynamically to CFD.In the unsteady conditions,the mixing quality of the two-bedroom shaft vibration mixer by the vibration shaft speed,solid particle volume fraction of the influence of the law are numerically simulated.And on this basis,the vibration stirring test is researched.The results show that when the mixing shaft speed is 35 r/min,and the mixture particle volume fraction is 20%,and the particle diameter is 10 mm,20 mm and 30 mm respectively,the vibration shaft speed is 960 r/min,1460 r/min and 1800 r/min respectively,the stirring quality is the best.The numerical simulation results are basically consistent with the experimental conclusions,which show the accuracy of the numerical calculation results and the feasibility of the calculation method.