排灌机械工程学报2017，Vol.35Issue(2)：93-99,7.DOI:10.3969/j.issn.1674-8530.16.0304
导叶安装位置对混流泵压力脉动特性的影响
Effects of diffuser installation position on pressure fluctuation in mixed flow pump
摘要
Abstract
In order to investigate the effects of diffuser installation position on the hydraulic perfor-mance, pressure fluctuation characteristics in a mixed flow pump,eight schemes (C0-C7) of diffe-rent diffuser installation position are analyzed through steady and unsteady simulations by using ANSYS CFX 14.5.Through grid independency analysis, the predicted results of the original scheme C0 has a good agreement with the experimental performance, thus the numerical simulation is reliable.The results show that the diffuser installation position almost has no effects on the head but influences the hydraulic efficiency obviously, and the head of each scheme reaches the design requirement.The hydraulic efficiency of C2 is the largest and that of C7 is the smallest, whose difference is about 2.6%.Each scheme has the same main activating frequency, three times blade passing frequency, but its amplitude is different, the amplitude of C7 is the largest and those of C0 and C2 are similar.Besides, the pressure fluctuation is weakened along the discharge pipe.The pressure fluctuation intensity varies evidently with the change of diffuser installation position, and the maximum in the circular casing occurs near the diffuser leading surface.The pressure fluctuation intensity of C7 is the largest, C0 taking the se-cond place, and that of C2 is the smallest.Overall, the diffuser installation position C2 has the optimal performance and pressure fluctuation, which can be a significant reference for installing the diffuser in the mixed flow pump.关键词
混流泵/导叶安装位置/数值计算/压力脉动/水力效率Key words
mixed flow pump/diffuser installation position/numerical calculation/pressure fluctuation/hydraulic efficiency分类
农业科技引用本文复制引用
顾延东,袁寿其,裴吉,刘永,曹健..导叶安装位置对混流泵压力脉动特性的影响[J].排灌机械工程学报,2017,35(2):93-99,7.基金项目
国家自然科学基金重点资助项目(51239005) （51239005）
江苏高校优势学科建设工程项目 （）
