海上湿气对翼型气动特性的影响初探

研究高湿度空气对风力机翼型气动性能影响对海上风力机翼型优化、提高发电效率具有重要意义。首先采用组分输运模型数值计算湿空气条件下翼型升阻力特性，其次在组分输运模型基础上，考虑湿空气中水蒸气的凝结，建立用户自定义函数定义凝结体积源项，求解输运方程。对湿空气流过翼型表面气动性能的初步研究发现：升阻力系数随湿度变化而改变，不考虑凝结时，升阻力系数随湿度增大而减小，当发生凝结时，升力系数增加。翼型表面前缘点附近凝结流量最大，翼型表面凝结流量随湿度增大而增大，温度越高，凝结流量越大。

Study of the influence of moist air on airfoil aerodynamic characteristics

The purpose of this paper is to study the effect of the moist air over an airfoil.The influence of moist air on the airfoil aerodynamic characteristics is very important for the optimiza-tion of offshore wind turbine airfoil and improving the efficiency of wind turbine.Firstly,the lift and drag of airfoil is calculated by using the component transport model.Then,the condensation of water vapor in the moist air is considered,and the condensation volume source is defined by the user defined function in fluent.The preliminary study on the aerodynamic performance of the moist air flow over airfoil shows that the lift and drag coefficient will change with the humidity. The condensation mass flux near the leading edge of the airfoil is the largest,and condensation mass flux of the airfoil increases with the increase of humidity.The condensation mass flux is higher at high temperature.