喷雾仿真中的网格依赖性

成传松; 李云清; 王艳华; 赵立峰

喷雾仿真中的网格依赖性

北京航空航天大学交通科学与工程学院,北京 100191

基金项目: 国家自然科学基金(50376003)

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- 文章访问数: 1881
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- 被引次数: 0
出版历程
- 收稿日期: 2010-09-01
- 修回日期: 2010-11-12
- 刊出日期: 2011-09-28

Investigation of the grid dependency from the spray simulation

School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 基于离散油滴模型,比较了原始喷雾模型与修正喷雾模型的网格依赖性.计算结果表明:原始喷雾模型由于采用O'Rourke碰撞模型以及最近节点法耦合算法,使得预测结果出现明显的网格依赖性.相反,修正喷雾模型采用独立的拉格朗日碰撞单元降低碰撞过程的网格依赖性,联合使用拉格朗日插值算法以及气相射流模型降低气液耦合过程对于网格的依赖性.因此修正喷雾模型能获得较好的低网格依赖性从而保证粗大网格下的计算精度.
- 喷雾模拟 /
- 碰撞模型 /
- 动量耦合 /
- 气相射流模型 /
- 网格依赖性
Abstract: Based on the discrete droplet model, the grid dependencies of the original spray model and revised spray model were compared. The results show that the apparent grid dependency exists in the simulated results with original spray model due to the application of O'Rourke collision model and momentum coupling algorithm with nearest node. However, the separate Lagrangian collision mesh is utilized to reduce the mesh dependency from the collision prediction, and the Lagrangian interpolation coupling algorithm and the gas-jet model are combined to cut down the mesh dependency from the momentum coupling calculation. Therefore, the revised spray model successfully achieves significant lower grid dependency so that the simulated accuracy of coarse grid is improved.
- spray simulation /
- collision model /
- momentum coupling /
- gas jet model /
- gird dependency

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参考文献(13)

[1]	Hiroyasu H,Arai M.Structures of fuel sprays in diesel engines .SAE Paper 900475,1990.
[2]	Schmidt D P,Rutland C J.A new droplet collision algorithm[J].J. Comput. Phys.,2000,164(1):62-80.
[3]	Schmidt D P,Rutland C J.Reducing grid dependency in droplet collision modeling[J].Journal of Engineering for Gas Turbines and Power,2004,126(2):227-233.
[4]	Nordin P A.Complex chemistry modeling of diesel spray combustion .Goteborg:Chalmers University of Technology,2001.
[5]	Qian J,Law K.Regimes of coalescence and separation in droplet collision[J].Journal of Fluid Mechanics,1997,331(1):59-80.
[6]	Ashgriz N,Poo J Y.Coalescence and separation in binary collisions of liquid drops[J].Journal of Fluid Mechanics,1990,221(1):183-204.
[7]	Brenn G,Valkouska D,Danov K D.The formation of satellite droplets by unstable binary drop collisions[J].Physics of Fluids,2001,13(9):2463-2477.
[8]	Brenn G,Kolobaric V.Satellite droplet formation by unstable binary drop collisions[J].Physics of Fluids,2006,18(8):0871011-08710118.
[9]	文华.基于CFD的柴油机喷雾混合过程的多维数值模拟 .武汉:华中科技大学,2004. WEN Hua.Multi-dimensional numerical modeling of spray mixing process in diesel engines based on CFD .Wu han:Huazhong University of Science and Technology,2004.(in Chinese)
[10]	徐海涛,刘永长,贺萍.对KIVA程序中气液耦合算法的修正[J].内燃机学报,1998,16(2):203-207. XU Haitao,LIU Yongchang,HE Ping.A correction to the gas-fluid coupling algorithm in KIVA code[J].Transaction of CSICE,1998,16(2):203-207.(in Chinese)
[11]	Abraham J.Entrainment characteristics of transient jets[J].Numerical Heat Transfer,Part A,1996,30(4):347-364.
[12]	Abani N,Munnannur A,Reitz R D.Reduction in numerical parameter dependencies in diesel spray models[J].Journal of Engineering for Gas Turbine and Power,2008,130(3):032809-032817.
[13]	Alfuso S,Allocca L,Auriemma M,et al.Analysis of a high pressure diesel spray at high pressure and temperature environment conditions .SAE Paper 2005-01-1239,2005.