【摘要】 畜牧轴流风机的扩散筒和进气箱对风机性能影响很大，但目前的研究很少。本文在整机计算基础上，首先以静压效率最大为目标函数，对扩散筒进行了优化，其次在静压约束的条件下，以进气流量最大为目标函数对进气箱进行优化。气动性能计算表明，曲线型扩散筒和进气箱经优化后，优化风机相对初始风机，设计静压下，流量提高了4.26%，静压效率提高了10.18%，能效比提高了12.6%；设计流量下，静压提高了10 Pa，静压效率提高了4.87%，能效比提高了1.74%。上述研究显示畜牧轴流风机的扩散筒与进气箱对风机性能有明显影响，也显示本文所采用的快速高效的分步优化方法的可行性。更多还原

【Abstract】 The diffuser cylinder and inlet box of axial-flow fans for livestock farming have a significant impact on the performance of the fans, yet there has been little research on this so far.Based on the simulation of the whole flow fields of the fans, this study first optimizes the diffuser cylinder using maximum static pressure efficiency as the objective function. Subsequently, under static pressure constraints, the inlet box is optimized with the aim of maximizing inlet flow rate.Aerodynamic performance analysis reveals that after the optimization of the curved diffuser cylinder and inlet box, compared to the initial design, for the optimized fan, at the design static pressure,the flow rate increases by 4.26%, the static pressure efficiency increases by10.18%, and the energy efficiency ratio rises by12.6%. At the design flow rate, the static pressure increases by 10 Pa, static pressure efficiency improves by 4.87%, and the energy efficiency ratio rises by 1.74%. The above research shows that the diffuser cylinder and inlet box of axial-flow fans for livestock farming have an obvious impact on the fan performance. It also demonstrates the feasibility of the fast and efficient step-by-step optimization method adopted in this paper.更多还原