基于CFD和网格自适应的流量系数计算方法
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摘要
针对某100%开度的蝶阀进行流场和流量系数的仿真计算,综合运用了y+自适应和速度梯度自适应技术对阀门内流场的网格模型进行不同程度的优化。参照国家标准实验测量了该阀门的流量系数,以该系数为标准来评价仿真方法的准确性。结果表明,基于网格自适应的CFD仿真方法能准确地预测阀门的流量系数,网格自适应技术的运用可以有效地提高计算精度,并减少人工优化网格的难度和工作量。
In this study,a series of computational fluid dynamics(CFD) simulations were performed with a 100% opening butterfly valve.Grid-adaption processes,including Y plus adaption and gradient adaption,were also applied to refine the meshes.To validate the CFD method,a series of experiments were also conducted according to the national standard of valves-test method of flow coefficient.The results show that the grid-adaption based CFD method can accurately predict the flow coefficients of valves,and the grid-adaption process can effectively improve the simulation accuracy while reducing the workload of mesh refinement.
In this study,a series of computational fluid dynamics(CFD) simulations were performed with a 100% opening butterfly valve.Grid-adaption processes,including Y plus adaption and gradient adaption,were also applied to refine the meshes.To validate the CFD method,a series of experiments were also conducted according to the national standard of valves-test method of flow coefficient.The results show that the grid-adaption based CFD method can accurately predict the flow coefficients of valves,and the grid-adaption process can effectively improve the simulation accuracy while reducing the workload of mesh refinement.
引文
[1]彭龑,郝刘峰.阀门内流场数值模拟分析研究[J].四川理工学院学报(自然科学版),2010,23(5):546-549.PENG Yan,HAO Liu-feng.Research on valve computational internal fluid dynamics[J].Journal of Sichuan University of Science&Engineering(Natural Science Edition),2010,23(5):546-549.
[2]赵莹,许健,张强.仿真技术在球阀特性研究中的应用[J].火箭推进,2013,39(6):29-34.ZHAO Ying,XU Jian,ZHANG Qiang.Application of simulation technology in ball valve characteristic study[J].Journal of Rocket Propulsion,2013,39(6):29-34.
[3]范海平,曾小林.基于计算流体动力学的流量系数研究[J].机电设备,2007,24(2):9-12.FAN Hai-ping,ZENG Xiao-lin.Research of discharge coefficient based on computing fluid dynamics[J].Mechanical and Electrical Equipment,2007,24(2):9-12.
[4]JEON S Y,YOON J Y,SHIN M S.Flow characteristics and performance evaluation of butterfly valves using numerical analysis[C]//IOP Conference Series Earth and Environmental Science.[S.l.]:IOP Publishing,2010.
[5]MOUJAES S F,JAGAN R.3D CFD predictions and experimental comparisons of pressure drop in a ball valve at different partial openings in turbulent flow[J].Journal of Energy Engineering,2008,134(1):24-28.
[6]沈新荣,陆冰,李江莉,等.一种新型电动蝶阀调节特性的数值计算与实验研究[J].液压与气动,2006(5):47-48.SHEN Xin-rong,LU Bing,LI Jiang-li,et al.The numerical analysis and experimental investigation for the regulating property of a new electric butterfly gate[J].Chinese Hydraulics&Pneumatics,2006(5):47-48.
[7]沈新荣,李江莉,李增珍,等.一种自动流量平衡阀的数值分析与实验研究[J].液压与气动,2006(1):56-61.SHEN Xin-rong,LI Jiang-li,LI Zeng-zhen,et al.The numerical analysis and experimental investigation of automatic flux compensation vavle[J].Chinese Hydraulics&Pneumatics,2006(1):56-61.
[8]沈新荣,潘康,单力钧,等.调节型球阀流量特性的数值分析与实验研究[J].流体传动与控制,2008,1(26):6-11.SHEN Xin-rong,PANG Kang,SHAN Li-jun,et al.The numerical analysis and experimental investigation of control ball valve’s flow characteristic[J].Fluid Power Transmission&Control,2008,1(26):6-11.
[9]杜平安,于亚婷,刘建涛.有限元法—原理、建模及应用[M].北京:国防工业出版社,2011:167-168.DU Ping-an,YU Ya-ting,LIU Jian-tao.Theory modeling and application of the finite element[M].Beijing:National Defend Industry Press,2011:167-168.
[10]周建中,张华杰,毕胜,等.自适应网格在复杂地形浅水方程求解中的应用[J].水科学进展,2013,24(6):861-868.ZHOU Jian-zhong,ZHANG Hua-jie,BI Sheng,et al.An application of adaptive grid method to shallow water equations on complex topography[J].Advances in Water Science,2013,24(6):861-868.
[11]韩志熔,陆志良,郭同庆,等.一种用于分离流动的网格自适应算法[J].空气动力学学报,2012,30(1):86-89.HAN Zhi-rong,LU Zhi-liang,GUO Tong-qing,et al.Grid adaption technique for separation flow[J].Acta Aerodynamica Sinica,2012,30(1):86-89.
[12]谭伟伟.网格自适应策略在高升力构型计算中的应用[J].航空计算技术,2010,40(6):38-42.TAN Wei-wei.Application of new grid adaption strategy on high lift configuration[J].Aeronautical Computing Technique,2010,40(6):38-42.
[13]CASTRO-DI?AZ M J,HECHT F,MOHAMMADI B,et al.Anisotropic unstructured mesh adaption for flow simulations[J].International Journal for Numerical Methods in Fluids,1997,25(4):475-491.
[14]HABASHI W G,DOMPIERRE J,BOURGAULT Y,et al.Anisotropic mesh adaptation:Towards user-independent,mesh-independent and solver-independent cfd.part I:General principles[J].International Journal for Numerical Methods in Fluids,2000,32(6):725-744.
[15]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.阀门流量系数和流阻系数试验方法国家标准:GB/T 30832-2014[S].北京:中国标准出版社,2014.General Administration of Quality Supervision,Inspection and Quarantine of the People's Republic of China,Standardization Administration of the People's Republic of China.Valves-test method of flow coefficient and flow resistance coefficient:GB/T 30832-2014[S].Beijing:Standards Press of China,2014.
[16]ANSYS.ANSYS 14.5 FLUENT User's Guide[EB/OL].[2015-10-12].http://www.ansys.com/.
[17]胡坤,李振北.ANSYS ICEM CFD工程实例详解[M].北京:人民邮电出版社,2014:210-211.HU Kun,LI Zhen-bei.The explanation of engineering example about ANSYS ICEM CFD[M].Beijing:Posts&Telecom Press,2014:210-211.
[18]崔宝玲,马光飞,王慧杰,等.阀芯结构对节流截止阀流阻特性和内部流动特性的影响[J].机械工程学报,2015,51(12):178-184.CUI Bao-ling,MA Guang-fei,WANG Hui-jie,et al.Influence of valve core structure on flow resistance characteristics and internal flow field of throttling stop valve[J].Journal of Mechanical Engineering,2015,51(12):178-184.
[19]张伟正,俞树荣,张希恒,等.调节阀内部流场的数值模拟与试验分析[J].兰州理工大学学报,2008,34(3):65-68.ZHANG Wei-zheng,YU Shu-rong,ZHANG Xi-heng,et al.Numerical simulation and experimental analysis of interior flow field in control valves[J].Journal of Lanzhou University of Technology,2008,34(3):65-68.
[2]赵莹,许健,张强.仿真技术在球阀特性研究中的应用[J].火箭推进,2013,39(6):29-34.ZHAO Ying,XU Jian,ZHANG Qiang.Application of simulation technology in ball valve characteristic study[J].Journal of Rocket Propulsion,2013,39(6):29-34.
[3]范海平,曾小林.基于计算流体动力学的流量系数研究[J].机电设备,2007,24(2):9-12.FAN Hai-ping,ZENG Xiao-lin.Research of discharge coefficient based on computing fluid dynamics[J].Mechanical and Electrical Equipment,2007,24(2):9-12.
[4]JEON S Y,YOON J Y,SHIN M S.Flow characteristics and performance evaluation of butterfly valves using numerical analysis[C]//IOP Conference Series Earth and Environmental Science.[S.l.]:IOP Publishing,2010.
[5]MOUJAES S F,JAGAN R.3D CFD predictions and experimental comparisons of pressure drop in a ball valve at different partial openings in turbulent flow[J].Journal of Energy Engineering,2008,134(1):24-28.
[6]沈新荣,陆冰,李江莉,等.一种新型电动蝶阀调节特性的数值计算与实验研究[J].液压与气动,2006(5):47-48.SHEN Xin-rong,LU Bing,LI Jiang-li,et al.The numerical analysis and experimental investigation for the regulating property of a new electric butterfly gate[J].Chinese Hydraulics&Pneumatics,2006(5):47-48.
[7]沈新荣,李江莉,李增珍,等.一种自动流量平衡阀的数值分析与实验研究[J].液压与气动,2006(1):56-61.SHEN Xin-rong,LI Jiang-li,LI Zeng-zhen,et al.The numerical analysis and experimental investigation of automatic flux compensation vavle[J].Chinese Hydraulics&Pneumatics,2006(1):56-61.
[8]沈新荣,潘康,单力钧,等.调节型球阀流量特性的数值分析与实验研究[J].流体传动与控制,2008,1(26):6-11.SHEN Xin-rong,PANG Kang,SHAN Li-jun,et al.The numerical analysis and experimental investigation of control ball valve’s flow characteristic[J].Fluid Power Transmission&Control,2008,1(26):6-11.
[9]杜平安,于亚婷,刘建涛.有限元法—原理、建模及应用[M].北京:国防工业出版社,2011:167-168.DU Ping-an,YU Ya-ting,LIU Jian-tao.Theory modeling and application of the finite element[M].Beijing:National Defend Industry Press,2011:167-168.
[10]周建中,张华杰,毕胜,等.自适应网格在复杂地形浅水方程求解中的应用[J].水科学进展,2013,24(6):861-868.ZHOU Jian-zhong,ZHANG Hua-jie,BI Sheng,et al.An application of adaptive grid method to shallow water equations on complex topography[J].Advances in Water Science,2013,24(6):861-868.
[11]韩志熔,陆志良,郭同庆,等.一种用于分离流动的网格自适应算法[J].空气动力学学报,2012,30(1):86-89.HAN Zhi-rong,LU Zhi-liang,GUO Tong-qing,et al.Grid adaption technique for separation flow[J].Acta Aerodynamica Sinica,2012,30(1):86-89.
[12]谭伟伟.网格自适应策略在高升力构型计算中的应用[J].航空计算技术,2010,40(6):38-42.TAN Wei-wei.Application of new grid adaption strategy on high lift configuration[J].Aeronautical Computing Technique,2010,40(6):38-42.
[13]CASTRO-DI?AZ M J,HECHT F,MOHAMMADI B,et al.Anisotropic unstructured mesh adaption for flow simulations[J].International Journal for Numerical Methods in Fluids,1997,25(4):475-491.
[14]HABASHI W G,DOMPIERRE J,BOURGAULT Y,et al.Anisotropic mesh adaptation:Towards user-independent,mesh-independent and solver-independent cfd.part I:General principles[J].International Journal for Numerical Methods in Fluids,2000,32(6):725-744.
[15]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.阀门流量系数和流阻系数试验方法国家标准:GB/T 30832-2014[S].北京:中国标准出版社,2014.General Administration of Quality Supervision,Inspection and Quarantine of the People's Republic of China,Standardization Administration of the People's Republic of China.Valves-test method of flow coefficient and flow resistance coefficient:GB/T 30832-2014[S].Beijing:Standards Press of China,2014.
[16]ANSYS.ANSYS 14.5 FLUENT User's Guide[EB/OL].[2015-10-12].http://www.ansys.com/.
[17]胡坤,李振北.ANSYS ICEM CFD工程实例详解[M].北京:人民邮电出版社,2014:210-211.HU Kun,LI Zhen-bei.The explanation of engineering example about ANSYS ICEM CFD[M].Beijing:Posts&Telecom Press,2014:210-211.
[18]崔宝玲,马光飞,王慧杰,等.阀芯结构对节流截止阀流阻特性和内部流动特性的影响[J].机械工程学报,2015,51(12):178-184.CUI Bao-ling,MA Guang-fei,WANG Hui-jie,et al.Influence of valve core structure on flow resistance characteristics and internal flow field of throttling stop valve[J].Journal of Mechanical Engineering,2015,51(12):178-184.
[19]张伟正,俞树荣,张希恒,等.调节阀内部流场的数值模拟与试验分析[J].兰州理工大学学报,2008,34(3):65-68.ZHANG Wei-zheng,YU Shu-rong,ZHANG Xi-heng,et al.Numerical simulation and experimental analysis of interior flow field in control valves[J].Journal of Lanzhou University of Technology,2008,34(3):65-68.