转捩模型对S815翼型气动特性的数值模拟

Numerical Simulation of Transition Model on the Aerodynamic Characteristics of γ-S815 Airfoil

采用基于SST k-ω湍流模型的y-Reθ转捩模型对S815翼型的气动特性进行了全湍流和考虑转捩的数值模拟。分析了转捩对静态和动态失速特性的影响及缩减频率对动态失速特性的影响。结果表明,对于静态失速,考虑转捩的分析结果与实验值吻合较好;对于动态失速,湍流转捩模型的翼型动态失速升力迟滞曲线与实验值吻合较好,随着缩减频率的增大,翼型失速攻角会增大,升力系数峰值会增大。

Based on SST k-ω turbulence model, a numerical simulation of γ-Reθ transition model for S815 airfoil has been made to investigate full turbulence and transition model effect on the Aerodynamic Characteristics. The study focuses on the influence of transition on the static and dynamic stall characteristics, and effects of reduced frequency on the dynamic stall characteristics. Results show that ： for the static stall, the transition analysis results are considered in accordance with the experimental data; for dynamic stall, two groups are analyzed respectively under the reduced frequency of airfoil lift force hysteresis curve which fits well into the experimental values. With the increase of reduced frequency, stall angle of attack increases, and the lift coefficient peak value increases.