摘要
南水北调惠南庄泵站单泵流量大、扬程高、泵组台数多,运行工况复杂,其水泵机组在不同条件下的合理组合和变频调节运行是保证机组高效稳定运行的关键。本文利用CFD技术,建立惠南庄泵站管路系统的三维数值模拟模型,计算管路损失并确定管路系统的流量-需要扬程特性曲线,据此确定不同机组组合变频调节方案下水泵的运行工况点。基于非定常数值计算和顺序流固耦合方法,分析了不同水泵机组组合变频调节方案下水泵泵体和叶轮的动应力及振动特性。定量分析表明,增加泵的运行台数会增加附属设备运行费用,但从机组稳定性方面考虑是有利的,可以降低泵结构动应力和振动主频幅值。
The Huinanzhuang Pump Station in the mid-route of South-North Water Transfer Project is char- acterized by large unit flow discharge, high head of delivery and large number of units with complicated op- eration conditions. A reasonable combination of the pump units with variable frequency regulation is the key factor to guarantee an efficient and stable operation. A three-dimensional numerical simulation model for the pipe system of Huinanzhuang Pump Station was set up based on CFD technique. The pipe line loss was calculated and the discharge-needed head curve was achieved. Then the operation work conditions of the pump under different combinations with variable frequency regulation were determined. On this basis, the dynamic stress and vibration performance of the pump casing and impeller under different combinations with variable frequency regulation were analyzed according to the unsteady numerical simulation and se- quence fluid structure interaction method. It is indicated that the operating cost will increase by adding ad- ditional pumps. However, the structure dynamic stress and the vibration amplitude can be reduced.
出处
《水利学报》
EI
CSCD
北大核心
2015年第7期853-858,共6页
Journal of Hydraulic Engineering
基金
大型离心泵系统压力脉动与水力激振特性研究(51139007)
关键词
动应力
振动
管路损失
双吸离心泵
惠南庄泵站
dynamic stress
vibration
line loss
double-suction pump
Huinanzhuang Pump Station
