航空学报 > 2007, Vol. 28 Issue (增): 28-34

使用GAO-YONG湍流方程组对翼型绕流的计算

任鑫,高歌   

  1. 北京航空航天大学 能源与动力工程学院
  • 收稿日期:2006-10-25 修回日期:2007-06-28 出版日期:2007-08-10 发布日期:2007-08-10
  • 通讯作者: 高歌

The Calculation of Airfoil Flows Using GAO-YONG Turbulence Equations

REN Xin,GAO Ge   

  1. School of Jet Propulsion, Beijing University of Aeronautics and Astronautics
  • Received:2006-10-25 Revised:2007-06-28 Online:2007-08-10 Published:2007-08-10
  • Contact: GAO Ge

摘要:

将GAO-YONG湍流方程组应用到翼型复杂绕流场的计算中,研究了机械能方程中Du/Dt项和各向异性湍流黏性系数分量中的实度系数Cs的影响,给出了控制Du/Dt项作用区域和选择实度系数Cs值的判别函数,对NACA4412翼型最大升力迎角下的低速绕流算例、AS240翼型8°迎角下的转捩算例、AS240翼型19°迎角下的分离流算例进行了模拟,与实验结果比较,得到了比较好的结果。结果表明GAO-YONG湍流方程组能够准确预测翼型前缘层流到湍流的转捩问题,翼型尾迹流动松弛问题和翼型大迎角分离流。

关键词: 湍流, 面翼型, 转捩, 恢复流, 分离流

Abstract:

GAO-YONG turbulence equations are applied to the complex flow of airfoil. The influence of the Du/Dt term in the mechanical energy equation and the substance coefficient Cs in orthotropic turbulence viscosity are explored, and two functions are introduced to select Du/Dtand Cs. The following airfoils in pre-stall or poststall conditions:NACA4412, AS240 airfoil are studied and compared with the experimental data.

Key words: turbulence,  , airfoil,  , transition,  , flow , recovery,  , separation , flow

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