北京航空航天大学学报 ›› 2013, Vol. 39 ›› Issue (5): 631-634,639.

• 论文 • 上一篇    下一篇

用GAO-YONG湍流模式对分离流动的数值模拟

高琳, 高歌, 江立军   

  1. 北京航空航天大学 航空发动机气动热力重点实验室, 北京 100191
  • 收稿日期:2012-11-19 修回日期:2013-05-07 出版日期:2013-05-31 发布日期:2013-05-22

Numerical simulation of separated turbulent flow using GAO-YONG turbulent model

Gao Lin, Gao Ge, Jiang Lijun   

  1. National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2012-11-19 Revised:2013-05-07 Online:2013-05-31 Published:2013-05-22

摘要: 采用GAO-YONG湍流模式对二维管道内三角形钝体绕流问题以及槽道内后台阶分离流动进行了数值模拟.求解程序基于开源数值计算平台OpenFOAM (Open Field Operation and Manipulation),数值模拟结果很好地预测了钝体绕流问题中漩涡脱落的尾流的流动趋势以及后台阶流动中分离再附的流动结构,同时分析了速度分布以及摩擦系数等参数并与实验值进行了对比,结果符合很好.这表明GAO-YONG湍流模式对大分离流动有较好的预测能力,对工程实践具有指导性作用.

Abstract: Numerical simulation of separated flow around a triangular cylinder and turbulent flow over a rearward-facing step in a diverging channel flow using GAO-YONG turbulence model were presented. All calculations were based on open field operation and manipulation(OpenFOAM), which is a open-source computational fluid dynamics(CFD) platform. The calculations predict the vortex shedding of flowing around bluff body and reattachment of flowing over rearward-facing step in a channel accurately. The distribution of pressure coefficient, friction coefficient and velocity were simulated numerically with GAO-YONG model, and agreed well with the experimental data. The results demonstrate that GAO-YONG turbulence model was capable to simulated the turbulent flow with large separation, and be of basic instructional effect to engineering and practice.

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