基于非结构网格求解器的DES和DDES数值模拟研究
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摘要
为了提高大分离流动的数值模拟的精准度,开展了高阶湍流数值模拟的方法研究,即混合LES/RANS模型中的DES类方法。其计算模块的开发主要基于内部代码(非结构计算平台—UNSMB)来进行,开发了基于Spalart-Allmaras模型的SA-DES和SA-DDES模块。主要阐述这两种湍流模拟方法的基本理论格式和算例验证计算的相关情况,即分别开展了45°NACA0012翼型和钝前缘三角翼VFE-2构型的算例计算。计算结果表明:UNSMB平台的DES和DDES模块可以应用于大分离流动及复杂漩涡运动的数值模拟计算,并具备良好的计算精准度,可以解析和捕捉由流场内部自身所诱导的强非定常运动和漩涡结构。
In order to improve the accuracy of numerical simulation for separated flow,advanced turbulent simulation methods,namely some DES approaches in Hybrid LES/RANS,were studied.Two modules(i.e.SA-DES and SA-DDES) were developed based on Spalart-Allmaras RANS turbulent model,in which the development of program modules was mainly according to the internal code(AVIC AERODYNAMICS RESEARCH INSTITUTE).In this paper,basic theory format of two turbulent modules and their numerical examples validate of NACA0012 airfoil shape with 45 degree and VFE-2 delta wing with blunt leading edges were also introduced.The results show that the DES and DDES modules in UNSMB CFD platform can be used to simulate complex large separation flow with vortex motion for good calculation accuracy,and can capture some strong unsteady motions and vortex structures caused by internal flow field itself.
In order to improve the accuracy of numerical simulation for separated flow,advanced turbulent simulation methods,namely some DES approaches in Hybrid LES/RANS,were studied.Two modules(i.e.SA-DES and SA-DDES) were developed based on Spalart-Allmaras RANS turbulent model,in which the development of program modules was mainly according to the internal code(AVIC AERODYNAMICS RESEARCH INSTITUTE).In this paper,basic theory format of two turbulent modules and their numerical examples validate of NACA0012 airfoil shape with 45 degree and VFE-2 delta wing with blunt leading edges were also introduced.The results show that the DES and DDES modules in UNSMB CFD platform can be used to simulate complex large separation flow with vortex motion for good calculation accuracy,and can capture some strong unsteady motions and vortex structures caused by internal flow field itself.
引文
[1] SHIA-HUI PENG.Simulation of turbulent flow past a rectangular open cavity using DES and unsteady RANS[C]//AIAA 2006-2827.24th Applied Aerodynamics Conference,2006.
[2] FERZIGER JH.Large eddy simulation.In:Gatski TB,Hussaini MY,Lumley JL,editors.Simulation and modelling of turbulent flows ICASE/LaRC series incomputer science engineering[M].New York:Oxford University Press,1996.
[3] C.HIRSCH.Numerical computation of internal and external flows[J].The Finite Difference Method for Structured Grids,2007(2):145-201.
[4] L.Martinelli.Calculation of viscous flows with multigrid methods[C]//Thesis Princeton University,Princeton,1987.
[5] A.JAMESON.Time dependent calculations using multigrid,with applications to unsteady flows past airfoils and wings[C]//AIAA Paper 91-1596,AIAA 10th Computational Fluid Dynamics Conference,1991.
[6] SPALART PR,ALLMARAS SR.A one-equation turbulence model for aerodynamic flows[C]//30th Aerospace Scrences Meeting and Exhibit,1992.
[7] SPALART P R,JOU W-H,STRELETS M,et al,Comments on the feasibility of LES for wings andon a hybrid RANS/LES approach[C]//Procedings of First AFosR International Conference on DNS/LES,1997.
[8] ROSE MC CALLEN,FRED BROWAND,JAMES ROSS.The Aerodynamics of Heary Vehicles:Trucks,Busos,and Trains[M].Berlin:Springer,2004.
[9] SPALART PR,DECK S,SHUR ML,et al.A new version of detached-eddy simulation resistant to ambiguous grid densities[J].Theoret Comput Fluid Dyn,2006,20(3):181-95.
[10] DR.R.PRABHAKARARAO,SRI SAMPATH.CFD analysis on airfoil at high Angles of attack[EB/OL].http://www.docin.com/p-1880049663.html,下载时间:2018-07-07.
[11] MCCROSKEY,W.J.Acritical assessment of wind tunnel results for the NACA 0012 airfoil[EB/OL].http://www.jdgcs.org,下载时间:2018-06-20.
[12] HONG-SIK IM,GE-CHENG ZHA.Delayed detached eddy simulation of a stall flow over NACA0012 airfoil using high order schemes[C]//AIAA 2011-1297.AIAA 49th Computational Fluid Dynamics Conference,2011.
[13] HUMMEL D,REDEKER G.A new vortex flow experiment for computer code validation[EB/OL]http://www.researchgate.net/publication,下载时间:2018-06-20.
[14] 胡偶,赵宁,沈志伟.SST-DDES模型在大分离流动问题中的应用[J].南京航空航天大学学报, 2017(2):206-211.
[15] DECK S,LUCKRING J M.Zonal detached eddy simulation (ZDES) of the flow around the AVT-183 diamond wing configuration[J].Aerodynamic Science And Technology,2016,57(2):43-51.
[2] FERZIGER JH.Large eddy simulation.In:Gatski TB,Hussaini MY,Lumley JL,editors.Simulation and modelling of turbulent flows ICASE/LaRC series incomputer science engineering[M].New York:Oxford University Press,1996.
[3] C.HIRSCH.Numerical computation of internal and external flows[J].The Finite Difference Method for Structured Grids,2007(2):145-201.
[4] L.Martinelli.Calculation of viscous flows with multigrid methods[C]//Thesis Princeton University,Princeton,1987.
[5] A.JAMESON.Time dependent calculations using multigrid,with applications to unsteady flows past airfoils and wings[C]//AIAA Paper 91-1596,AIAA 10th Computational Fluid Dynamics Conference,1991.
[6] SPALART PR,ALLMARAS SR.A one-equation turbulence model for aerodynamic flows[C]//30th Aerospace Scrences Meeting and Exhibit,1992.
[7] SPALART P R,JOU W-H,STRELETS M,et al,Comments on the feasibility of LES for wings andon a hybrid RANS/LES approach[C]//Procedings of First AFosR International Conference on DNS/LES,1997.
[8] ROSE MC CALLEN,FRED BROWAND,JAMES ROSS.The Aerodynamics of Heary Vehicles:Trucks,Busos,and Trains[M].Berlin:Springer,2004.
[9] SPALART PR,DECK S,SHUR ML,et al.A new version of detached-eddy simulation resistant to ambiguous grid densities[J].Theoret Comput Fluid Dyn,2006,20(3):181-95.
[10] DR.R.PRABHAKARARAO,SRI SAMPATH.CFD analysis on airfoil at high Angles of attack[EB/OL].http://www.docin.com/p-1880049663.html,下载时间:2018-07-07.
[11] MCCROSKEY,W.J.Acritical assessment of wind tunnel results for the NACA 0012 airfoil[EB/OL].http://www.jdgcs.org,下载时间:2018-06-20.
[12] HONG-SIK IM,GE-CHENG ZHA.Delayed detached eddy simulation of a stall flow over NACA0012 airfoil using high order schemes[C]//AIAA 2011-1297.AIAA 49th Computational Fluid Dynamics Conference,2011.
[13] HUMMEL D,REDEKER G.A new vortex flow experiment for computer code validation[EB/OL]http://www.researchgate.net/publication,下载时间:2018-06-20.
[14] 胡偶,赵宁,沈志伟.SST-DDES模型在大分离流动问题中的应用[J].南京航空航天大学学报, 2017(2):206-211.
[15] DECK S,LUCKRING J M.Zonal detached eddy simulation (ZDES) of the flow around the AVT-183 diamond wing configuration[J].Aerodynamic Science And Technology,2016,57(2):43-51.