摘要
为了研究双吸泵内部流场在不同流量工况下的湍流特性,选取SST k-ω湍流模型,利用ANSYS CFX软件对双吸泵内部流场进行多流量工况数值模拟,得到了不同工况下双吸泵叶轮以及蜗壳流道内的湍流流场。分析结果表明:叶轮和蜗壳内的湍动能在设计工况时最弱,涡粘系数同湍动能呈正相关;流量偏离设计工况越大则湍动能越大;正向涡量的存在有助于叶片与流体之间的能量转换,而叶轮流道内的Z向涡量随流量的增大而减小。
In order to study the turbulent characteristics of internal flow field under different flow conditions in a double-suction centrifugal pump, the SST k-ω turbulence model is selected and the ANSYS CFX software is used to simulate the flow field of pump. The results show that： （a） the turbulent kinetic energy in impeller and spiral case are weakest under design condition, and the eddy viscosity coefficient is positively correlated to turbulent kinetic energy; （b） the greater the flow deviation from design conditions, the greater the turbulent kinetic energy is; （c） the existence of positive vorticity contributes to the energy conversion between blade and fluid, and the vorticity at Z direction in impeller flow channel will decrease with the increase of flow rate.
出处
《水力发电》
北大核心
2017年第6期76-79,共4页
Water Power
基金
国家自然科学基金项目(51279172)
西华大学省部级学科平台开放课题(szjj2016-004)
西华大学重点科研基金资助项目(Z1510417)
关键词
双吸泵
湍动能
涡粘系数
涡量
double-suction pump
turbulent kinetic energy
eddy viscosity coefficient
vorticity
