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重点探讨了正反向性能完全相同的可逆式轴流风机叶片设计新方案。首先 ,通过对现阶段可逆式轴流风机叶片性能试验数据的分析比较 ,得出已有的和正在研究的正反向性能相同的双对称叶型并不能令人满意的结论 ,由此论述了正反向最大升力系数值可望提高 1 0 %以上的指标及其途径 ;其次 ,提出了一种正反向组合叶片的全新的设想。它具有可以充分利用现成、成熟叶型等众多优点 ,还可望继续提高其性能指标 ;第三 ,对应用正向前弯动叶片的可行性论证表明 ,在保证射流风机正反向推力相等的前提下 ,正向最大升力系数值可望进一步提高 1 0 %以上。
The new scheme of reversing axial fan blades with exactly the same positive and negative performance is discussed. First of all, by analyzing and comparing the present experimental data of reversible axial-flow fan blades, it is concluded that the existing symmetrical and symmetrical double-symmetrical blades are not satisfactory. The positive and negative maximum lift coefficient values are expected to increase by more than 10% of the indicators and ways; secondly, a new concept of positive and negative combination of blades is proposed. It has the advantages of making full use of ready-made, mature leaves and many other advantages, but also is expected to continue to improve its performance indicators; Third, the feasibility of forward bending blade application shows that in ensuring the jet fan thrust equal thrust Under the premise, the positive lift coefficient is expected to further improve the value of more than 10%.