尺度解析湍流模拟方法在液力传动流动数值模拟中的应用
|
摘要
尺度解析模拟(Scale-Resolving Simulation,SRS)是指在一定尺度范围内对流动控制方程进行解析求解,理论上比全模化的雷诺应力平均(RANS)方法更先进。采用大涡模拟(Large Eddy Simulation,LES)中各种亚格子模型(Sub-grid Scale,SGS)和混合模型Hybrid RANS/LES对液力元件包括:液力偶合器、液力变矩器和液力缓速器的内部流动进行了瞬态模拟。对比模拟结果与试验数据发现,SRS方法能够提高对液力元件外特性的预测精度,通过对复杂的瞬态流动现象的清晰捕捉,深入展示了描述流动机理的能力。SRS模拟表现出了工业应用的潜力。
Scale-Resolving Simulation(SRS) has the ability of partially resolving the flow field, which is more theoretically advanced than RANS. However, RANS method has always played a dominant role in simulation of hydrodynamic transmission so far. In this paper, s series of SRS simulations, employing LES with various SGS models and Hybrid RANS/LES method, were carried out in the transient flow simulation of hydraulic coupling, torque converter and hydraulic retarder. Compared with the experimental data, it was found that the accuracy of performance prediction was improved, and a closer understanding of flow mechanism was obtained by clearly capturing the complex instantaneous flow phenomena, which was significant for industrial application. The SRS simulation showed the potential in industrial application.
Scale-Resolving Simulation(SRS) has the ability of partially resolving the flow field, which is more theoretically advanced than RANS. However, RANS method has always played a dominant role in simulation of hydrodynamic transmission so far. In this paper, s series of SRS simulations, employing LES with various SGS models and Hybrid RANS/LES method, were carried out in the transient flow simulation of hydraulic coupling, torque converter and hydraulic retarder. Compared with the experimental data, it was found that the accuracy of performance prediction was improved, and a closer understanding of flow mechanism was obtained by clearly capturing the complex instantaneous flow phenomena, which was significant for industrial application. The SRS simulation showed the potential in industrial application.
引文
[1] 马文星,何延东,刘春宝.液力传动研究现状分析与展望[J].农业机械学报,2008,39(7):51-55.MA Wenxing,HE Yandong,LIU Chunbao.Situation and Prospects of Research on Hydrodynamic Transmission [J].Transactions of the Chinese Society for Agricultural Mac-hinery,2008,39(7):51-55.
[2] 褚亚旭.基于CFD的液力变矩器设计方法的理论与实验研究[D].长春:吉林大学,2006.CHU Yaxu.Theoretical and Experimental Research on De-sign Method on Hydrodynamic Torque Converter Based on CFD [D].Changchun:Jilin University,2006.
[3] LEE C,JANG W,LEE J M,et al.Three Dimensional Flow Field Simulation to Estimate Performance of a Torque Converter [R].No.2000-01-1146.SAE Technical Paper,2000.
[4] SHIEH T,PERNG C,CHU D,et al.Torque Converter Analytical Program for Blade Design Process [R].No.2000-01-1145.SAE Technical Paper,2000.
[5] WU Guangqiang,YAN Peng.System for Torque Converter Design and Analysis Based on CAD/CFD Integrated Platform [J].Chinese Journal of Mechanical Engineering,2008,21(4):35-39.
[6] KIM B S,HA S B,LIM W S,et al.Performance Estima-tion Model of a Torque Converter—Part I:Correlation Bet-ween the Internal Flow Field and Energy Loss Coefficient [J].International Journal of Automotive Technology,2008,9(2):141-148.
[7] LEI Yulong,WANG Chang,LIU Zhengjie,et al.Analysis of the Full Flow Field of Torque Converter [J].Advanced Materials Research,2012,468-471,674-677.
[8] Fluent Inc.,ANSYS Fluent Theory Guide [Z].Boca Raton:Fluent Inc.,2015.
[9] CAI Wei,et al.Numerical Investigation of Fluid Flow and Performance Prediction in a Fluid Coupling Using Large Eddy Simulation [J].International Journal of Rotating Mac-hinery,2017.
[10] LIU Chunbao,BU Weiyang,XU Dong,et al.Application of Hybrid RANS/LES Turbulence Models in Rotor-stator Fluid Machinery:a Comparative Study [J].International Journal of Numerical Methods for Heat & Fluid Flow,2017,27(12):2717-2743.
[11] LIU Chunbao,LIU Changsuo,MA Wenxing.Rans,Deta-ched Eddy Simulation and Large Eddy Simulation of Internal Torque Converters Flows:a comparative Study [J].Engineering Applications of Computational Fluid Me-chanics,2015,9(1):114-125.
[12] LIU Chunbao,XU Zhixuan,MA Wenxing,et al.CFD Inve-stigating Medium-temperature Influences on Performance Prediction and Structure Stress Calculation in a Hydro-dynamic Torque Converter [J].Numerical Heat Transfer Applications,2017,(2):1-16.
[13] 徐志轩.液力变矩器内流场尺度解析求解方法研究[D].长春:吉林大学,2017.XU Zhixuan.Study on Scale-resolving Simulation for In-ternal Flows of Hydrodynamic Torque Converter [D].Changchun:Jilin University,2017.
[14] 闫清东,李晋,魏巍.工作油液温度对液力变矩器性能影响计算流体力学分析及试验研究[J].机械工程学报,2014,50(12):118-125.YAN Qingdong,LI Jin,WEI Wei.Research on Effect of Working Oil Temperature for Hydraulic Torque [J].Jou-rnal of Mechanical Engineering,2014,50(12):118-125.
[15] LIU Chunbao,XU Dong,MA Wenxing,et al.Analysis of Unsteady Rotor-stator Flow with Variable Viscosity Based on Experiments and CFD Simulations [J].Numerical Heat Transfer,2015,68(12):1351-1368.
[16] LIU Chunbao,BU Weiyang,WANG Tongjian.Numerical Investigation on Effects of Thermophysical Properties on Fluid Flow in Hydraulic Retarder [J].International Jou-rnal of Heat & Mass Transfer,2017,114:1146-1158.
[17] 徐东.液力缓速器热流场SBES模拟与其板翅换热器多目标优化研究[D].长春:吉林大学,2016.XU Dong.Research on Heat-flow Field Simulation of Hydrodynamic Retarder with SBES and Muti-objective Opti-mization of its Plate-fin Heat Exchanger [D].Changchun:Jilin University,2016.
[2] 褚亚旭.基于CFD的液力变矩器设计方法的理论与实验研究[D].长春:吉林大学,2006.CHU Yaxu.Theoretical and Experimental Research on De-sign Method on Hydrodynamic Torque Converter Based on CFD [D].Changchun:Jilin University,2006.
[3] LEE C,JANG W,LEE J M,et al.Three Dimensional Flow Field Simulation to Estimate Performance of a Torque Converter [R].No.2000-01-1146.SAE Technical Paper,2000.
[4] SHIEH T,PERNG C,CHU D,et al.Torque Converter Analytical Program for Blade Design Process [R].No.2000-01-1145.SAE Technical Paper,2000.
[5] WU Guangqiang,YAN Peng.System for Torque Converter Design and Analysis Based on CAD/CFD Integrated Platform [J].Chinese Journal of Mechanical Engineering,2008,21(4):35-39.
[6] KIM B S,HA S B,LIM W S,et al.Performance Estima-tion Model of a Torque Converter—Part I:Correlation Bet-ween the Internal Flow Field and Energy Loss Coefficient [J].International Journal of Automotive Technology,2008,9(2):141-148.
[7] LEI Yulong,WANG Chang,LIU Zhengjie,et al.Analysis of the Full Flow Field of Torque Converter [J].Advanced Materials Research,2012,468-471,674-677.
[8] Fluent Inc.,ANSYS Fluent Theory Guide [Z].Boca Raton:Fluent Inc.,2015.
[9] CAI Wei,et al.Numerical Investigation of Fluid Flow and Performance Prediction in a Fluid Coupling Using Large Eddy Simulation [J].International Journal of Rotating Mac-hinery,2017.
[10] LIU Chunbao,BU Weiyang,XU Dong,et al.Application of Hybrid RANS/LES Turbulence Models in Rotor-stator Fluid Machinery:a Comparative Study [J].International Journal of Numerical Methods for Heat & Fluid Flow,2017,27(12):2717-2743.
[11] LIU Chunbao,LIU Changsuo,MA Wenxing.Rans,Deta-ched Eddy Simulation and Large Eddy Simulation of Internal Torque Converters Flows:a comparative Study [J].Engineering Applications of Computational Fluid Me-chanics,2015,9(1):114-125.
[12] LIU Chunbao,XU Zhixuan,MA Wenxing,et al.CFD Inve-stigating Medium-temperature Influences on Performance Prediction and Structure Stress Calculation in a Hydro-dynamic Torque Converter [J].Numerical Heat Transfer Applications,2017,(2):1-16.
[13] 徐志轩.液力变矩器内流场尺度解析求解方法研究[D].长春:吉林大学,2017.XU Zhixuan.Study on Scale-resolving Simulation for In-ternal Flows of Hydrodynamic Torque Converter [D].Changchun:Jilin University,2017.
[14] 闫清东,李晋,魏巍.工作油液温度对液力变矩器性能影响计算流体力学分析及试验研究[J].机械工程学报,2014,50(12):118-125.YAN Qingdong,LI Jin,WEI Wei.Research on Effect of Working Oil Temperature for Hydraulic Torque [J].Jou-rnal of Mechanical Engineering,2014,50(12):118-125.
[15] LIU Chunbao,XU Dong,MA Wenxing,et al.Analysis of Unsteady Rotor-stator Flow with Variable Viscosity Based on Experiments and CFD Simulations [J].Numerical Heat Transfer,2015,68(12):1351-1368.
[16] LIU Chunbao,BU Weiyang,WANG Tongjian.Numerical Investigation on Effects of Thermophysical Properties on Fluid Flow in Hydraulic Retarder [J].International Jou-rnal of Heat & Mass Transfer,2017,114:1146-1158.
[17] 徐东.液力缓速器热流场SBES模拟与其板翅换热器多目标优化研究[D].长春:吉林大学,2016.XU Dong.Research on Heat-flow Field Simulation of Hydrodynamic Retarder with SBES and Muti-objective Opti-mization of its Plate-fin Heat Exchanger [D].Changchun:Jilin University,2016.