Hydraulic performance of a large slanted axial-flow pump
Hydraulic performance of a large slanted axial-flow pump
复制标题
大型倾斜轴流泵的水力性能
DOI：
10.1108/02644401011022391
复制
发表时间：
2010-01-01
影响因子：
1.6
通讯作者：
Hu, Deyi
中科院分区：
文献类型：
--
作者：
Wang, Zhengwei;Peng, Guangjie;Hu, Deyi
用途-太浦河泵站的水泵，流量大，扬程低，是世界上最大的150台斜式轴流泵之一。然而，对大型斜轴流泵的安全运行研究较少。本文的目的是分析泵的叶轮高度、非定常流、水力推力和零水头流动特性。设计/方法/途径-在泵设计过程的初始阶段，对泵内和通过泵的流场进行了数值分析，然后对泵的整个流道进行分析，计算出泵的水力推力，防止轴承损坏，提高泵的运行性能稳定性零扬程泵的流量特性进行了分析，以确保泵将可靠地工作在低得多的heads.Findings -计算结果是在良好的协议与实验数据的泵海拔效应，性能曲线，压力振荡，水力推力和零扬程performance.Research限制/影响-因为它是假设，有没有叶片和护罩之间的间隙，间隙空化超出了本文的范围。独创性/价值-本文指出了斜轴流泵的特性，包括特性曲线，压力波动，液压推力和径向力的正常运行条件和零水头条件。介绍了如何用计算流体力学的方法来保证泵的安全运行。
Purpose - The pump of the Taipuhe Pump Station, larger flow discharge, lower head, is one of the largest 150 slanted axial-flow pumps in the world. However, few studies have been done for the larger slanted axial-flow pump on safe operation. The purpose of this paper is to analyze the impeller elevation, unsteady flow, hydraulic thrust and the zero-head flow characteristics of the pump.Design/methodology/approach - The flow field in and through the pump was analyzed numerically during the initial stages of the pump design process, then the entire flow passage through the pump was analyzed to calculate the hydraulic thrust to prevent damage to the bearings and improve the operating stability The zero-head pump flow characteristics were analyzed to ensure that the pump will work reliably at much lower heads.Findings - The calculated results are in good agreement with experimental data for the pump elevation effects, the performance curve, pressure oscillations, hydraulic thrust and zero-head performance.Research limitations/implications - Since it is assumed that there is no gap between blades and shroud, gap cavitations are beyond the scope of the paper.Originality/value - The paper indicates the slanted axial-flow pump characteristics including the characteristic curves, pressure fluctuations, hydraulic thrust and radial force for normal operating conditions and zero-head conditions. It shows how to guarantee the pump safety operating by computational fluid dynamics.