垂直轴风力机桨叶气膜加热的数值研究

Numerical studies of wind turbine blade gas film heating

为观察风力机叶片在前缘开孔和不开孔两种情况下旋转叶片表面成膜情况,基于双向多流管理论模型,采用MATLAB软件编写程序及Fluent进行数值模拟,将程序计算结果与数值模拟结果进行比对,基于数值模拟分析两种模型在不同孔射流速度下的气动特性及流场情况。结果表明,数值模拟能够很好地反映流场特性,在来流风速及转速一定的条件下,孔射流速度过大会极大地削弱旋转叶片的气动性能,过小又不能形成很好的气膜保护。研究结果对H型垂直轴风力机防除冰叶片的设计具有一定的参考意义。

Rotating blade surface film forming conditions of wind turbine blade with or with-out tip holes are investigated.Based on two-way flow tube theory model,using MATLAB soft-ware programming and Fluent software for numerical simulation,the calculation results obtained from this two methods were compared,based on numerical simulation analysis of two kinds of models in different jet velocities on the aerodynamic characteristics and flow mechanics.Results show that numerical simulation can well reflect the characteristics of flow field.With certain rotation rate and wind speed,aerodynamic performance of the rotating blade will be seriously weaken when the jet velocity is too large,however,a good air film protection can not be formed with too small rotation rate and wind speed.The research results have certain importance for the design of H type vertical axis wind turbine control ice blade.