【摘要】 应用数值模拟技术,计算了不同轴向间隙轴流风扇级内部三维流动和总性能,详细分析了该风扇级分别在最大流量状态和近失速点状态下内部流动细节,分析不同轴向间隙对风扇级堵塞和失速机理的影响,并比较不同轴向间隙对风扇级总性能的影响。结果表明,轴向间隙的大小对风扇级性能影响很大,反压相同时,轴向间隙减小,流过风扇级质量流量、压比、效率均减小。更多还原

【Abstract】 The internal 3-D viscous flow fields of the transonic axial-flow fans are numerically analyzed and the overall performances for the fans are obtained.The internal flow fluids are analyzed in detail with maximal flow state and near stall state,the blockage mechanisms and stall mechanisms of the fan stages are analyzed with different axial spacing,and the impact of different axial spacing on the overall performances for the fans are analyzed.The answer shows that the axial spacing is important for performance of the fan stages,mass flow rate,pressure ratio,and efficiency all decreased as the axial spacing between the rotor and stator is reduced.更多还原