首页> 中文期刊> 《西北工业大学学报》 >Spalart 的曲率修正方法在 SST k-ω模型中的应用

Spalart 的曲率修正方法在 SST k-ω模型中的应用

         

摘要

Applying Spalart and Shur’s rotation-curvature correction method to the SST k-ωturbulence model, we establish what we call SSTRC k-ωmodel.The SSTRC model is verified through two turbulent flows : one is the flow over the mild curvature curved wall and the other is the flow in a plane channel with a U-turn.Numerical Predic-tions of the SSTRC model are compared with available experimental data , on the one hand, and with the corre-sponding results of the original standard SST model , on the other hand.It is found that in terms of accuracy the SSTRC model is significantly better than the original SST model .The improvements in accuracy of SSTRC might be highly dependent on the rotation-curvature model constants, but, for most cases, setting cr1 =1,cr2 =1 and cr3 =0.6, can give fairly good numerical results for SSTRC model.%  基于 Spalart 和 Shur 的曲率修正方法,修改 SST k-ω模型的生成源项,给出了一种考虑曲率效应的 SSTRC k-ω模型,然后数值模拟了具有轻微曲率效应的弯曲壁面和具有强曲率效应的180°U 形弯管流动。数值模拟结果表明:修改后的 SSTRC k-ω模型能够正确反映曲率效应所带来的额外雷诺应力,可以给出比原 SST k-ω模型更加准确的计算结果,更适用于处理带有流线弯曲的流动问题;并能保证和原 SST k-ω模型相当的数值收敛性;SSTRC k-ω模型对计算精度的改进程度严重依赖于曲率修正常数,但对大多数流动问题,采用目前确定的常数,SSTRC k-ω模型都可以给出比较准确合理的结果。

著录项

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号