Numerical simulation and analysis of the flow in a two-staged axial fan

[摘要] In this paper, numerical simulation was performed for the internal three-dimensional turbulent flow field in the two-stage axial fan using steady three-dimensional in-compressible Navier-Stokes equations coupled with the Realizable turbulent model. The numerical simulation results of the steady analysis were combined with the flow characteristics of two- staged axial fan, the influence of the mutual effect between the blade and the vane on the flow of the two inter-stages was analyzed emphatically. This paper studied how the flow field distribution in inter-stage is influenced by the wake interaction and potential flow interaction of mutual effect in the impeller-vane inter-stage and the vane-impeller inter-stage. The results showed that: Relatively, wake interaction has an advantage over potential flow interaction in the impeller-vane inter-stage; potential flow interaction has an advantage over wake interaction in the vane-impeller inter-stage. In other words, distribution of flow field in the two interstages is determined by the rotating component.

[发布机构] Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou; 310018, China^1;Zhejiang Shuangyang Fan CO. Ltd., Shangyu; 312300, China^2

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] Compressible Navier-Stokes equations;Flow charac-teristics;Flow field distribution;Mutual effects;Simulation and analysis;Three dimensional turbulent flow field;Turbulent models;Wake interactions