完全可逆轴流风机的设计与优化

Design and Optimization of Fully Reversible Axial-flow Fan

针对可逆轴流风机S型叶片正反向运行损失较大,效率难以大幅度提高的问题,本文分析了组合叶栅相对于S型叶片的优势,采用组合叶栅的构想设计组合叶片可逆风机;采用可控涡扭向规律的设计方法设计出高效轴流风机单转子;为了探索可逆风机组合叶片设计中前后排叶片的相对位置对风机总性能的影响,对组合叶片设计进行了基于不同轴向和周向位置的布局探索,共建立了16套不同的转子模型,并进行详细的数值计算和分析对比,得出了可逆风机组合叶片设计前后排叶片布局的最佳方案,最终得到的完全可逆风机的性能满足要求,正反风效率均在85%以上,同时,由于前后排叶片的完全对称布置,保证了风机正反风性能的完全可逆性。

Aiming at the problem of greater losses in the forward and reverse operating of reversible axial-flow fan S-blade and problem of efficiency difficult to significantly improved, this paper analyzed the advantage of combined cascade relative to the S-shaped blade, so the concept of adopting combined cascade to design and combine reversible fan blades was pointed out, and the method of adopting controllable vortex torsional law was used to design high-efficient axial-flow fan with single rotor. Furthermore, in order to explore the influence of the relative positions of front and rear blades in the design of reversible fan combined blades on the overall performance of fan, the layout exploration was carried out on the combined blade’s design based on different axial and circumferential positions. Meanwhile, 16 sets of different rotor models were established, which were calculated＆nbsp;numerically and analyzed in detail. So the optimal solution of designing the layout of front and rear blades for reversible fan was obtained. Finanlly, the obtained performance of fully reversible fan met the requirements, the efficiency in positive and negative position is above 85%. Meanwhile, the completely symmetrical layout of front and rear blades had ensured the fan performance was completely reversible.