文丘里管内气固两相流离散相仿真模型优化  

Optimization of DPM simulation model of gas-solid two-phase flow in venturi tube

作　　者：李红文[1] 张涛[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《合肥工业大学学报（自然科学版）》2014年第1期42-47,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(60974118);国家高技术研究发展计划资助项目(2007AA04Z180)

摘　　要：文章针对Fluent中气固两相流离散相模型(DPM)仿真,以文丘里管内流场为例,在结合气相流场分析与固相颗粒受力分析的基础上,提出DPM模型优化的4项措施,即从颗粒所受各个力的合理取舍、气相速度入口模型、颗粒曳力模型及颗粒碰壁关系4个方面进行优化,以提高通用模型对管道节流复杂流场问题仿真时的准确性。通用模型的优化通过调用Fluent相关宏并编制UDF程序实现。对文丘里管的工况进行仿真模拟,并与国家标准中的数据进行对比,结果验证了优化DPM模型的准确性明显优于通用DPM模型。模型优化的方法对于其他类似的复杂流场工况具有通用性,具有工程实用价值。Aiming at the discrete phase model（DPM） simulation of gas-solid two-phase flow in Fluent, and taking the flow field in venturi tube as an example, the optimization measures on the general DPM are proposed based on the analysis of gas flow field and forces acting on solid particles. These optimi- zation measures are taken from four aspects, namely the reasonable choice of each force on particles, the gas inlet velocity model, the particle drag model and the collision of particles with internal surface of pipeline, so as to improve the simulation accuracy of general model on pipeline throttling with com- plex flow field. The optimization of general model is achieved by calling Fluent software related macro and compiling user defined function（UDF） program. The simulation of the venturi tube is carried out, and the results are compared with the data of national standard. It is verified that the accuracy of the optimized DPM model is significantly superior to that of the general DPM model. Besides, the presented optimization method is versatile for other pipeline with complex flow field and has engineering application value.

关 键 词：计算流体力学 气固两相流 离散相模型 用户自定义函数 文丘里管 

分 类 号：TH814.51[机械工程—仪器科学与技术] TP391.99[机械工程—精密仪器及机械]