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XY-SAS模型中不同网格尺度限制器的影响分析

郑玮琳 阎超

郑玮琳, 阎超. XY-SAS模型中不同网格尺度限制器的影响分析[J]. 北京航空航天大学学报, 2014, 40(12): 1725-1729. doi: 10.13700/j.bh.1001-5965.2013.0742
引用本文: 郑玮琳, 阎超. XY-SAS模型中不同网格尺度限制器的影响分析[J]. 北京航空航天大学学报, 2014, 40(12): 1725-1729. doi: 10.13700/j.bh.1001-5965.2013.0742
Zheng Weilin, Yan Chao. Influence analysis on grid scale limiter of XY-SAS model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1725-1729. doi: 10.13700/j.bh.1001-5965.2013.0742(in Chinese)
Citation: Zheng Weilin, Yan Chao. Influence analysis on grid scale limiter of XY-SAS model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1725-1729. doi: 10.13700/j.bh.1001-5965.2013.0742(in Chinese)

XY-SAS模型中不同网格尺度限制器的影响分析

doi: 10.13700/j.bh.1001-5965.2013.0742
详细信息
    作者简介:

    郑玮琳(1989-),女,湖北潜江人,博士生,djtcalice@sina.com

    通讯作者:

    阎超

  • 中图分类号: V211.3

Influence analysis on grid scale limiter of XY-SAS model

  • 摘要: XY-SAS(Xu & Yan Scale Adaptive Simulation)模型通过在SA(Spalart-Allmaras)模型耗散项的湍流尺度中引入基于平均涡量的冯卡门长度尺度,在不稳定流动区域具有类似LES(Large Eddy Simulation)的计算性能,且不存在DES(Detached Eddy Simulation)方法中RANS(Reynolds Averaged Navier-Stokes)与LES的交界面问题.由于SAS类模型预测的湍流能谱存在高波数衰减不足的缺陷,需要进一步在湍流尺度中引入网格尺度作为限制器.采用不同形式的网格尺度限制器构造了3种XY-SAS模型,对Re=3 900的圆柱绕流进行数值模拟,并与DES及实验数据进行比较.结果表明网格尺度限制器对XY-SAS模型的计算性能有较大影响,以最小网格间距作为高波数衰减限制器是较为合理的选择,此时模型对于大分离流动能够达到DES的模拟能力.

     

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出版历程
  • 收稿日期:  2014-01-08
  • 刊出日期:  2014-12-20

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