【摘要】 为了减小轴流泵导叶段水力损失,提高轴流泵性能,本文提出一种新型后置导叶——可调式导叶。通过理论推导,得出了可调式导叶的调整规律,在实验结果验证的基础上,采用数值模拟方法,对固定导叶和可调式导叶两种模型下轴流泵内的水力特性进行了分析。分析结果表明:导叶进口冲角和尾部脱流是导致导叶段水力损失的两大主要因素;可调式导叶可以通过调节角度显著改善轴流泵导叶段的流态,减小水力损失,提高水泵扬程和效率。更多还原

【Abstract】 This paper proposes a new adjustable guide vane(AGV) that reduces hydraulic loss and improves performance of axial flow pump.The relationship between the guide vane angle and operating parameters of the pump is obtained by theoretical analysis.Flows in the pump are simulated for the cases of fixed vanes and AGV.The calculated Q-H curve of fixed vanes agrees well with the experiment.Results show that inflow incidence and flow separation of the guide vane flow are two major factors to the formation of vortices that cause extra hydraulic loss in the guide vane channel,and that the capability of adjusting guide vane angle is responsible for the decrease in hydraulic loss and the increases in pump head and pumping efficiency.更多还原