摘要
采用CFD软件在稳态计算复杂模型时,发现使用多重参考系分析固液两相流常常会出现计算结果不收敛的问题。在不改变数值模型边界条件的情况下,调整多重参考系动区域比率的取值,将搅拌固液两相的PY平直叶圆盘涡轮搅拌釜按不同比率划分了20组,分析其动区域不同比率划分对稳态计算的收敛性、搅拌器的流场速度分布、固体颗粒体积分数分布、悬浮状态及搅拌器功率等结果的影响。结果表明:动区域比率β取值小于1.4时,计算不收敛,增大动区域比率能提高模型计算的收敛性。随着动区域比率增大,计算出的标准浓度差最大值与最小值的误差超过10%,速度与力矩的最大值与最小值误差都未超过2%,即动区域比率变化对模拟出的标准浓度差影响较大,对速度分布、搅拌器功率的影响较小。
When using CFD software to calculate complex models in steady state,it is found that the problem of non-convergence of calculation results often occurs when using multiple reference frames to analyze solid-liquid twophase flows.Without changing the boundary conditions of the numerical model,the value of the ratio of multiple reference frame regions was adjusted,and 20 groups of PY straight leaf disc turbine stirring kettles with strring solid-liquid two-phase were divided into different ratios,and the effects of different ratios of the moving region on the convergence of steady-state calculation,the flow field velocity distribution of the agitator,the volume fraction distribution of solid particles,the suspension state and the power of the agitator were analyzed.The results show when the value of the moving region ratio β is less than 1.4,the calculation does not converge,and increasing the moving region ratio can improve the convergence of the model calculation.With the increase of the moving area ratio,the eror between the maximum and minimum values of the calculated difference in standard concentration 10%,and the error of the maximum and minimum values of speed and torque does not exceed 2%,that is,the change of the moving region ratio has a greater impact on the simulated difference in standard concentration,and has little effect on the velocity distribution and stirrer power.
作者
岳相丞
石艳
廖映华
赵练
YUE Xiang-cheng;HI Yan;LIAO Ying-hua;ZHAO lian(College of Mechanical Engineering,Sichuan University of Science and Engineering,Yibin Sichuan 644000,China;Yibin Intelligent Terminal Digital Manufacturing Engineering Technology Research Center,Yibin Sichuan 644000,China)
出处
《计算机仿真》
2024年第8期309-314,共6页
Computer Simulation
基金
四川省科技厅重点研发项目(2022YFG0068)。
关键词
圆盘涡轮式搅拌器
收敛性
数值模拟
多重参考系
Disc turbine agitator
Astringency
Numerical simulation
Multiple reference frames
