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为研究结构参数变化对叶片稳态流场载荷的影响规律,通过数值求解方法开展不同转-静轴向间距和周向栅距工况下带凸肩风扇叶片的稳态流场计算。利用自行开发的插值程序将稳态载荷施加于叶片,分析叶片受力规律。基于稳态气动载荷和离心载荷,分析各工况下叶片的静力学特征。结果表明:随着上游静子与转子叶片轴向间距的减小,叶片受力和力矩增大。轴向间距减小3mm,周向力和力矩分别增大1.51%和1.48%;随着栅距的减小,叶片受力和力矩减小。转子叶片数增加两片,周向力和力矩分别减小6.26%和6.35%。
In order to study the influence of structural parameters on the steady-state flow field of blades, the steady-state flow field of the fan blades with shoulders under different rotational-static axial spacing and circumferential pitch were studied by numerical method. The self-developed interpolation program is used to apply the steady-state load to the blade and analyze the force law of the blade. Based on steady-state aerodynamic loads and centrifugal loads, the static characteristics of the blades under various working conditions were analyzed. The results show that with the decrease of axial distance between upstream stator and rotor blade, the stress and moment of blade increase. The axial distance is reduced by 3mm, and the circumferential force and torque are increased by 1.51% and 1.48% respectively. With the reduction of the pitch, the stress and moment of blade are reduced. The number of rotor blades increased by two and the circumferential force and moment decreased by 6.26% and 6.35% respectively.