摘要
翼型是低速轴流风扇气动设计的基础。在低雷诺数下,层流翼型与机翼翼型相比,具有层流边界层范围更宽,升力系数更高的特点。在设计参数不变的条件下,采用FX63-137层流翼型代替Clark-Y翼型,使得所设计的风扇在转速降低500 r/min后依然可以达到之前的流量和压升。同时,根据Fukuna翼型噪声预测模型,计算出应用FX63-137层流翼型的风扇在转速降低500 r/ min后,其气动噪声降低2.1分贝。
The airfoil is the basis of aerodynamic design of the low-speed axial fan. Compared between the laminar airfoil and wing airfoil under the condition of low Reynolds numbers, the laminar airfoil has the feature of wider laminar boundary and higher lift coefficient. If the FX63-137 is used instead of Clark-Y airfoil in the condition that the design data is kept unchanged, the designed fan is able to reach original flow and pressure-rise at the reduced rotating speed of 500rpm. Meanwhile in accordance with the Fukuna airfoil noise predication model, the noise value of the FX63-137 fan is calculated to be 2 db less at the re-duced rotating speed of 500 rpm.
作者
胡磊
戴韧
HU Lei;DAI Ren(Shanghai Electric Power Generation Equipment Co.,Ltd Generator Plant;University of Shanghai for Science and Technology)
出处
《电机技术》
2018年第6期6-11,共6页
Electrical Machinery Technology
关键词
轴流风扇
层流翼型
流动噪声
axial fan
laminar airfoil
aerodynamic noise