摘要
通过采用标准的k-ε模型和SIMPLE算法,对倒角为半圆形、倒角半径为1.2 mm、2 mm以及4 mm的离心泵在不同流量工况下进行数值模拟,研究叶轮叶片前缘倒角对离心泵内部流场流动情况的影响。通过模拟以及对数值结果的后处理,得出了不同倒角离心泵模型在不同流量工况下的压力分布云图、流线图及扬程性能曲线。结果表明,1.2 mm倒角模型与传统的半圆形倒角模型的扬程曲线更加吻合,在偏离设计工况点,其扬程比传统模型的扬程更高,更加符合离心泵的实际运行情况。
Use a standard k-e model and a semi-implicit method for pressure linked equations （SIMPLE） algorithm and conducted a numerical simulation for several types of chamfers in different sizes, which are respectively semi-circular, 1.2 mm, 2mm, and 4mm for centrifugal pump models under different flow conditions. The influence of the impeller blade leading edge chamfer on internal flow is also researched. The pressure distribution nephogram and streamline diagram of several kinds of chamfers for centrifugal pump models were obtained under different flow conditions. The head of a 1.2mm chamfer model under off-design conditions is almost coincident with that under design point. Results indicate that the new designs are more consistent with the actual operation of the centrifugal pump.
作者
张玲
张伟
王冲
ZHANG Ling, ZHANG Wei, WANG Chong
出处
《电站系统工程》
2018年第2期1-5,共5页
Power System Engineering
关键词
数值计算
离心泵
叶轮叶片
倒角半径
不同工况
numerical calculation
centrifugal pumps
impeller blades
radius of the chamfer
different conditions
