基于叶轮压水室特性匹配的离心泵作透平的性能预测

发布时间：2018-08-17 13:37

【摘要】：离心泵反转作透平(PAT)作为一种方便快捷的能量回收装置,具有显著的工农业应用价值,PAT应用的前提是掌握离心泵正反转模式下性能参数的换算关系。本文从有限叶片数的欧拉方程和转轮进出口速度三角形出发,推导了PAT转轮特性方程。借鉴离心泵叶轮和压水室的特性匹配原理,由PAT转轮与压水室特性方程联立求解获得了PAT的最优工况点流量、扬程等参数的预测计算公式。该性能预测方法仅需已知转轮和压水室的几何参数而不受比转速等条件的限制,具有通用性和实用性。预测方法得到了PAT的实测结果的验证,性能预测和试验结果的相对误差都在工程允许的范围内,表明本文所提出的性能预测方法是切实可行的,可为PAT的选型及应用提供理论依据。
[Abstract]:As a convenient and fast energy recovery device, centrifugal pump reverse turbine (PAT) has significant industrial and agricultural application value. The premise of Pat application is to master the conversion relationship of performance parameters in positive and negative mode of centrifugal pump. Based on the Euler equation of finite blade number and the speed triangle of runner inlet and outlet, the characteristic equation of PAT runner is derived. Based on the characteristic matching principle of centrifugal pump impeller and pressurized water chamber, the prediction formulas of PAT's optimal working conditions such as flow rate and head are obtained by solving the characteristic equation of PAT runner and water chamber simultaneously. The performance prediction method only needs to know the geometric parameters of the runner and water chamber without the restriction of specific speed and so on. It is universal and practical. The prediction method is verified by the measured results of PAT, and the relative error between the performance prediction and the test results is within the scope of engineering, which shows that the performance prediction method proposed in this paper is feasible. It can provide theoretical basis for the selection and application of PAT.
【作者单位】：华南理工大学;广东省佛山水泵厂有限公司;
【分类号】：TH311

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