混流风机整机数值模拟及流固耦合分析（英文）
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摘要
为了改进叶型设计方法、提升SWF型号风机的通风效率,运用数值模拟的方法,并结合fluent软件分析了该混流式风机整机的内部流场状态,获得了风机内部压力场和速度场等有价值的信息,再运用流固耦合的原理,借助Ansys workbench平台将所得到的风机流场内部的表压添加到风机固体模型上,得出了风机运行时的应力和位移结果。最后通过改变流速,得到了多组不一样的全压和效率值,利用Matlab软件可以拟合出风机的效率曲线。结果表明:应力从叶根位置到叶顶位置逐渐减小,叶根位置的应力值为最大值;位移从叶根位置到叶顶位置逐渐变大,最大的位移值出现在叶顶位置。同时得出了风机的运行工况在流速为6-8时的效率最高。
In order to improve the design method of the blade and ventilation efficiency of the SWF type fan,this research used numerical simulation and the FLUENT software to analyze the internal flow field of the mixed fan and obtains the change rule of internal stress field and velocity field. Then,with the help of the Fluid-Structure coupling principle and the ANSYS Workbench,we added the stress in the flow field to the solid model. And the stress and displacement of the fan were obtained. Finally,by changing flow velocity,many sets of different stress and efficiency were obtained,and the efficiency curves of the fan was fitted by MATLAB. The results show that stress decreased gradually from root to top of the blade,and the maximum stress appeared at root of blade. The displacement increased gradually from root to top of the blade,and the maximum displacement appeared at top of blade. The highest efficiency was at the velocity of 6-8 m/s.
In order to improve the design method of the blade and ventilation efficiency of the SWF type fan,this research used numerical simulation and the FLUENT software to analyze the internal flow field of the mixed fan and obtains the change rule of internal stress field and velocity field. Then,with the help of the Fluid-Structure coupling principle and the ANSYS Workbench,we added the stress in the flow field to the solid model. And the stress and displacement of the fan were obtained. Finally,by changing flow velocity,many sets of different stress and efficiency were obtained,and the efficiency curves of the fan was fitted by MATLAB. The results show that stress decreased gradually from root to top of the blade,and the maximum stress appeared at root of blade. The displacement increased gradually from root to top of the blade,and the maximum displacement appeared at top of blade. The highest efficiency was at the velocity of 6-8 m/s.
引文
[1]YU Z W,XU X L,GUO J,et al.Fracture Analysis of Impeller Blade of a Locomotive Draught-Fan[J].Engineering Failure Analysis,2013,27(1):16-29.
[2]AZEM A,MATHIS P,STUTE F,et al.Efficiency Increase of Free Running Centrifugal Fans Through a Pressure Regain U-nit used in an Air Handling Unit[J].Energy and Buildings,2018,165:321-327.
[3]RONG R,CUI K,LI Z,et al.Numerical Study of Centrifugal Fan with Slots in Blade Surface[J].Procedia Engineering,2015,126:588-591.
[4]ZANON A,GENNARO M D,KUEHNELT H,et al.Assessment of the Broadband Noise From an unducted Axial Fan including the Effect of the Inflow Turbulence[J].Journal of Sound and Vibration,2018,429:18-33.
[5]ANGELINI G,BONANNI T,CORSINI A,et al.Optimization of an Axial Fan for Air Cooled Condensers[J].Energy Procedia,2017,126:754-761.
[6]MATTHEWS R D,GASIOREK J M,CAVANAGH J.Deviation in a Mixed Flow Fan[J].Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy,1991,205(41):241-248.
[7]MEYER C J,KRGER D G.Numerical Simulation of the Flow Field in the Vicinity of an Axial Flow Fan[J].International Journal for Numerical Methods in Fluids,2001,36(8):947-969.
[8]YE X,DING X,ZHANG J,et al.Numerical Simulation of Pressure Pulsation and Transient Flow Field in an Axial Flow Fan[J].Energy,2017,129(1):11-13.
[9]GONG Z.Impact of IGV/rotor Interaction on Rotor Flow Field in an Axial Compressor[J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(1):32-37.
[10]SHIOMI N,KANEKO K,SETOGUCHI T.Natures of Rotating Stall Cell in a Diagonal Flow Fan[J].Journal of Thermal Science,2005,14(1):9.
[11]SAKATA Y,OHTA Y.Coexisting State of Surge and Rotating Stall in a Two-Stage Axial Flow Compressor Using a Double-Phase-Locked Averaging Technique[J].Journal of thermal science,2017,6(1):38-46.
[12]AMOO L M.On the Design and Structural Analysis of Jet Engine Fan Blade Structures[J].Progress in Aerospace Sciences,2013,60(4):1-11.
[13]SHAO W,LI Y M,JIA L H.Simulation of Flow Field inside Centrifugal Fan[J].Mining&Processing Equipment,2006,27(7):27-28.
[14]GALLONI E,PARISI P,MARIGNETTI F,et al.CFDAnalyses of a Radial Fan for Electric Motor Cooling[J].Thermal Science and Engineering Progress,2018,8:470-476.
[15]UPADHYAY R,SINHA S.3.6 GE-90 and Derivative Fan Blade Manufacturing Design[J].Comprehensive Composite Materials II,2018:180-188.
[16]WU Z R,WANG S L,RONG R,et al.Dynamic Characteristic Analysis on Impeller of Centrifugal Fan Based on FluidStructure Coupling[J].Journal of Chinese Society of Power Engineering,2013,33(1):53-60.
[17]CHEN H X,QI W J,WANG L Y,et al.Research on the Fatigue Properties of Fluid-Structure Coupling of the Wind Turbine Impeller[J].Mechanical design&manufacturing,2015(12):31-34.
[18]ZHONG J Q,LI S P,MA L F,et al.Research on Stress and Strain and Modal of De-mixing Fan based on Fluid-Structure Coupling[J].Journal of Agricultural Mechanization Research,2017,39(6):18-22.
[19]CHU S L,YU G S,QIN R H,et al.Numerical Simulation of Internal Three-Dimensional Flow in Axial-Flow FireFighting Fan[C]//International Conference on Test and Measurement.IEEE,2010,2:351-354.
[2]AZEM A,MATHIS P,STUTE F,et al.Efficiency Increase of Free Running Centrifugal Fans Through a Pressure Regain U-nit used in an Air Handling Unit[J].Energy and Buildings,2018,165:321-327.
[3]RONG R,CUI K,LI Z,et al.Numerical Study of Centrifugal Fan with Slots in Blade Surface[J].Procedia Engineering,2015,126:588-591.
[4]ZANON A,GENNARO M D,KUEHNELT H,et al.Assessment of the Broadband Noise From an unducted Axial Fan including the Effect of the Inflow Turbulence[J].Journal of Sound and Vibration,2018,429:18-33.
[5]ANGELINI G,BONANNI T,CORSINI A,et al.Optimization of an Axial Fan for Air Cooled Condensers[J].Energy Procedia,2017,126:754-761.
[6]MATTHEWS R D,GASIOREK J M,CAVANAGH J.Deviation in a Mixed Flow Fan[J].Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy,1991,205(41):241-248.
[7]MEYER C J,KRGER D G.Numerical Simulation of the Flow Field in the Vicinity of an Axial Flow Fan[J].International Journal for Numerical Methods in Fluids,2001,36(8):947-969.
[8]YE X,DING X,ZHANG J,et al.Numerical Simulation of Pressure Pulsation and Transient Flow Field in an Axial Flow Fan[J].Energy,2017,129(1):11-13.
[9]GONG Z.Impact of IGV/rotor Interaction on Rotor Flow Field in an Axial Compressor[J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(1):32-37.
[10]SHIOMI N,KANEKO K,SETOGUCHI T.Natures of Rotating Stall Cell in a Diagonal Flow Fan[J].Journal of Thermal Science,2005,14(1):9.
[11]SAKATA Y,OHTA Y.Coexisting State of Surge and Rotating Stall in a Two-Stage Axial Flow Compressor Using a Double-Phase-Locked Averaging Technique[J].Journal of thermal science,2017,6(1):38-46.
[12]AMOO L M.On the Design and Structural Analysis of Jet Engine Fan Blade Structures[J].Progress in Aerospace Sciences,2013,60(4):1-11.
[13]SHAO W,LI Y M,JIA L H.Simulation of Flow Field inside Centrifugal Fan[J].Mining&Processing Equipment,2006,27(7):27-28.
[14]GALLONI E,PARISI P,MARIGNETTI F,et al.CFDAnalyses of a Radial Fan for Electric Motor Cooling[J].Thermal Science and Engineering Progress,2018,8:470-476.
[15]UPADHYAY R,SINHA S.3.6 GE-90 and Derivative Fan Blade Manufacturing Design[J].Comprehensive Composite Materials II,2018:180-188.
[16]WU Z R,WANG S L,RONG R,et al.Dynamic Characteristic Analysis on Impeller of Centrifugal Fan Based on FluidStructure Coupling[J].Journal of Chinese Society of Power Engineering,2013,33(1):53-60.
[17]CHEN H X,QI W J,WANG L Y,et al.Research on the Fatigue Properties of Fluid-Structure Coupling of the Wind Turbine Impeller[J].Mechanical design&manufacturing,2015(12):31-34.
[18]ZHONG J Q,LI S P,MA L F,et al.Research on Stress and Strain and Modal of De-mixing Fan based on Fluid-Structure Coupling[J].Journal of Agricultural Mechanization Research,2017,39(6):18-22.
[19]CHU S L,YU G S,QIN R H,et al.Numerical Simulation of Internal Three-Dimensional Flow in Axial-Flow FireFighting Fan[C]//International Conference on Test and Measurement.IEEE,2010,2:351-354.