基于OpenFOAM的化工泵全流场数值模拟及性能预测
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摘要
为了验证开源软件OpenFOAM在化工泵数值计算中的准确性,以OpenFOAM5.0为平台,在0.3 Q_d～1.4 Q_d(Q_d为设计工况流量)的工况范围内对IH型化工离心泵进行稳态和瞬态全流场数值计算。流动控制方程选取标准k-ε湍流模型,稳态和瞬态计算分别采用simpleFoam和pimpleDyMFoam求解器。通过后处理软件ParaView显示计算得到的泵内流速、压力及流线分布,分析泵内旋涡与流动损失的关系,预测计算泵的扬程、输入功率及效率等外特性参数。在同样的计算模型、网格及边界条件下,将开源软件OpenFOAM和商用CFD软件预测计算的泵性能参数与实测结果进行对比,结果表明:OpenFOAM在化工泵性能预测方面有较高的精度。(图6,参23)
In order to verify the accuracy of open-source software OpenFOAM in the numerical simulation of petrochemical pump, the open-source software OpenFOAM5.0 was used as a platform to perform steady-state and unsteady-state numerical simulation on the full flow field of IH-type petrochemical centrifugal pump in the operating flow rate range of 0.3 Q_d-1.4 Q_d(Q_d is the design flow rate). The standard k-ε turbulence model was adopted in the flow control equation. The simpleFoam and pimpleDyMFoam solvers were used for the steady-state and unsteady-state calculation respectively. ParaView, the postprocessing software in OpenFOAM, was used to display the calculated flow velocity, pressure and streamline distribution, analyze the relationship between the vortex and the flow loss in the pump, and predict and calculate the external performance parameters of the pump, such as head, input power and efficiency. The pump performance parameters predicted by the open-source software OpenFOAM and the commercial CFD software were compared with the measured values under the same calculation model, grid and boundary conditions. It is indicated that OpenFOAM has higher accuracy in the performance prediction of petrochemical pumps.(6 Figures, 23 References)
In order to verify the accuracy of open-source software OpenFOAM in the numerical simulation of petrochemical pump, the open-source software OpenFOAM5.0 was used as a platform to perform steady-state and unsteady-state numerical simulation on the full flow field of IH-type petrochemical centrifugal pump in the operating flow rate range of 0.3 Q_d-1.4 Q_d(Q_d is the design flow rate). The standard k-ε turbulence model was adopted in the flow control equation. The simpleFoam and pimpleDyMFoam solvers were used for the steady-state and unsteady-state calculation respectively. ParaView, the postprocessing software in OpenFOAM, was used to display the calculated flow velocity, pressure and streamline distribution, analyze the relationship between the vortex and the flow loss in the pump, and predict and calculate the external performance parameters of the pump, such as head, input power and efficiency. The pump performance parameters predicted by the open-source software OpenFOAM and the commercial CFD software were compared with the measured values under the same calculation model, grid and boundary conditions. It is indicated that OpenFOAM has higher accuracy in the performance prediction of petrochemical pumps.(6 Figures, 23 References)
引文
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[21]张凌新,胡龙兵,邵雪明.滑移网格下泵内流场的非定常流计算[J].水动力学研究与进展,2013,28(1):10-16.ZHANG L X,HU L B,SHAO X M.Computational of unsteady flow fields in a pump using sliding mesh method[J].Journal of Hydrodynamics,2013,28(1):10-16.
[22]许璐荣,万德成.毂帽鳍水动力性能数值研究[J].中国舰船研究,2018,13(增刊1):15-21.XU L R,WAN D C.Numerical research on hydrodynamic characteristics of propeller boss cap fins[J].Chinese Journal of Ship Research,2018,13(S1):15-21.
[23]HUANG S,QIU G,SU X,et al.Flow performance analysis on shutoff condition in centrifugal pump based on CFDsimulation[C].Wuhan:ISFMFE-6th International Symposium on Fluid Machinery and Fluid Engineering,2014:1-5.
[2]王庆锋,郝帅,李凯,等.基于CFD数值模拟的换热器外导流筒结构选型[J].石油机械,2017,45(2):116-121.WANG Q F,HAO S,LI K,et al.CFD-based Selection of external flow distributor structure for heat exchanger[J].China Petroleum Machinery,2017,45(2):116-121.
[3]马卫国,牟荻,彭平生.基于CFD的液态CO2密闭混砂器结构参数设计[J].石油机械,2018,46(4):60-64.MA W G,MOU D,PENG P S.Design of structural parameters of liquid CO2 airtight sand blender[J].China Petroleum Machinery,2018,46(4):60-64.
[4]LI W,YANG C,YU L,et al.Prediction on hydrodynamic performances of propeller by OpenFOAM[C].Honolulu:200928th International Conference on Ocean,Offshore and Arctic Engineering,2009:633-638.
[5]PETIT O,NILSSON H.Numerical investigations of unsteady flow in a centrifugal pump with a vaned diffuser[J].International Journal of Rotating Machinery,2013,2013:1-14.
[6]NILSSON H.Evaluation of OpenFOAM for CFD of turbulent flow in water turbines[C].Yokohama:The 23rd IAHRSymposium on Hydraulic Machinery and Systems,2006:1-9.
[7]PETIT O,PAGE M,BEAUDOIN M,et al.The ERCOFTACcentrifugal pump OpenFOAM case-study[C].Brno:The 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problem in Hydraulic Machinery and Systems,2009:523-532.
[8]XIE S S.Studies of the ERCOFTAC centrifugal pump with OpenFOAM[D].Goteborg:Chalmers University of Technology,2010:1-46.
[9]ZHANG H,ZHANG L.Numerical simulation of cavitating turbulent flow in a high head Francis turbine at part load operation with OpenFOAM[J].Procedia Engineering,2012,31:156-165.
[10]NUERNBERG M,TAO L.Three dimensional tidal turbine array simulations using OpenFOAM with dynamic mesh[J].Ocean Engineering,2018,147:629-646.
[11]CASTILLA R,GAMEZ-MONTERO P J,RAUSH G,et al.Method for fluid flow simulation of a gerotor pump using OpenFOAM[J].Journal of Fluids Engineering,2017,139(11):111101-1-111101-9.
[12]任芸,刘厚林,吴登昊,等.基于OpenFOAM的离心泵内部流动数值模拟[J].应用基础与工程科学学报,2012,20(6):1042-1050.REN Y,LIU H L,WU D H,et al.Numerical simulation of the inner flow in a centrifugal pump with OpenFOAM[J].Journal of Basic Science and Engineering,2012,20(6):1042-1050.
[13]LUO J Y,ISSA R I,GOSMAN A D.Prediction of impellerinduced flow in mixing vessels using multiple frames of reference[C].New York:Institution of Chemical Engineers Symposium Series,1994:549-556.
[14]ARNONE A,PACCIANI R.Rotor-stator interaction analysis using the Navier-Stokes equations and a multigrid method[J].Journal of Turbomachinery,1996,118(4):679-689.
[15]DAWES W N.Simulation of the unsteady interaction of a centrifugal impeller with its vaned diffuser:flow analysis[J].Journal of Turbomachinery,1995,117(2):213-222.
[16]PATANKAR S V,SPALDING D B.A calculation procedure for heat,mass and momentum transfer in three-dimensional parabolic flows[J].International Journal of Heat&Mass Transfer,1972,15(10):1787-1806.
[17]陶文铨.数值传热学[M].西安:西安交通大学出版社,2001:226-227.TAO W Q.Numerical heat transfer[M].Xi'an:Xi'an Jiaotong University Press,2001:226-227.
[18]JASAK H.Error analysis and estimation for the finite volume method with applications to fluid flows[D].London:Imperial College of Science,Technology and Medicine,1996:97-100.
[19]FARRELL P E,MADDISON J R.Conservative interpolation between volume meshes by local Galerkin projection[J].Computer Methods in Applied Mechanics and Engineering,2011,200(1/2/3/4):89-100.
[20]张凯琳.应用PimpleDyMFoam的水平轴潮流能水轮机数值计算研究[D].大连:大连理工大学,2013:1-72.ZHANG K L.Numerical study of horizontal tidal current turbine by using PimpleDyMFoam[D].Dalian:Dalian University of Technology,2013:1-72.
[21]张凌新,胡龙兵,邵雪明.滑移网格下泵内流场的非定常流计算[J].水动力学研究与进展,2013,28(1):10-16.ZHANG L X,HU L B,SHAO X M.Computational of unsteady flow fields in a pump using sliding mesh method[J].Journal of Hydrodynamics,2013,28(1):10-16.
[22]许璐荣,万德成.毂帽鳍水动力性能数值研究[J].中国舰船研究,2018,13(增刊1):15-21.XU L R,WAN D C.Numerical research on hydrodynamic characteristics of propeller boss cap fins[J].Chinese Journal of Ship Research,2018,13(S1):15-21.
[23]HUANG S,QIU G,SU X,et al.Flow performance analysis on shutoff condition in centrifugal pump based on CFDsimulation[C].Wuhan:ISFMFE-6th International Symposium on Fluid Machinery and Fluid Engineering,2014:1-5.