Numerical Investigation on a Transition Prediction Model
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摘要: 采用了新型的转捩预测模式,将间歇因子耦合到湍流脉动输运方程中去,计及流体转捩的内在因素,因而能够反映转捩的具体发展过程.以二维不可压平板边界层和二维NACA0012翼型为例,研究了该转捩模式在预测不可压转捩流动时的作用,得到与实验值符合良好的计算结果.同时也研究了该转捩模式在不同网格分辨率下的计算能力和对近壁面网格分辨率的要求.Abstract: A new transition prediction model was introduced which coupled the intermittency effect into the turbulence transport equations and took the characteristics of fluid transition into consideration so as to mimic the exact process of transition.Test cases including two-dimensional incompressible plate and two-dimensional NACA0012 airfoil,and the performance of this transition model used in incompressible flow were studied.It was proved that the numerical results were well consistent with experimental data.Meanwhile the requirement of grid resolution for this transition model was also studied.
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Key words:
- transition /
- turbulent modeling /
- intermittency /
- grid resolution /
- skin friction
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