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试验利用两组轴流试验风机,一组为常规动叶的轴流风机,另一组为弯掠动叶的轴流风机,保持它们具有(除弦长外)相同的几何参数和相同的转速(弯掠动叶弦长增加量为20%左右)。实验结果表明:具有弯掠动叶的轴流风机不仅提高了效率(3%~4%左右),降低了气动噪声(2~4dB),而且还大幅度地扩大稳定工作范围(20%左右)。同时对上述两组轴流风机的气动和声学性能进行计算分析。所研究的这种高效节能的弯掠动叶轴流风机为进一步在电力系统中应用提供了理论和试验基础。
Two sets of axial flow test fans were used in the experiment. One was an axial fan with a conventional rotor blade and the other was an axial fan with swept-swept rotor blades. They kept the same geometric parameters (except for the chord length) and the same rotational speed (Curved swept chord chord length increase of about 20%). The experimental results show that the axial flow fan with curved swept blades not only improves the efficiency (about 3% ~ 4%), reduces aerodynamic noise (2 ~ 4dB), but also greatly expands the stable working range (about 20% . At the same time, the aerodynamic and acoustic performances of the above two axial fans are calculated and analyzed. The highly efficient energy-saving swept-lobe axial-flow fan studied provides the theoretical and experimental basis for further application in power system.