CAJ | 학술논문

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。
남수북조혜남장빙참단빙류량대、양정고、빙조태수다，운행공황복잡，기수빙궤조재불동조건하적합리조합화변빈조절운행시보증궤조고효은정운행적관건。본문이용CFD기술，건립혜남장빙참관로계통적삼유수치모의모형，계산관로손실병학정관로계통적류량-수요양정특성곡선，거차학정불동궤조조합변빈조절방안하수빙적운행공황점。기우비정상수치계산화순서류고우합방법，분석료불동수빙궤조조합변빈조절방안하수빙빙체화협륜적동응력급진동특성。정량분석표명，증가빙적운행태수회증가부속설비운행비용，단종궤조은정성방면고필시유리적，가이강저빙결구동응력화진동주빈폭치。
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.