哈尔滨工程大学学报2026，Vol.47Issue(2)：264-272,9.DOI:10.11990/jheu.202406006
多场耦合作用下螺旋轴流泵磁流体密封热特性
Thermal characteristics of ferrofluid seals in helical axial-flow pumps under multi-field coupling effects
摘要
Abstract
To address the unreliability of traditional seals caused by unstable pulsating flow in helical axial-flow multiphase pumps,this paper innovatively proposes a ferrofluid shaft sealing technology for helical axial-flow pumps.Combining numerical simulations and experiments,the thermodynamic and magnetic characteristics of the sealing device are investigated.First,data interpolation between grid nodes is employed to achieve magnetic-fluid coupling.Subsequently,the energy equation is coupled to establish a thermal-flow-magnetic multi-field numerical model.The viscosity of the ferrofluid is precisely regulated based on its magneto-viscous and thermo-viscous properties.The effects of rotational speed,shaft diameter,magnetic force,and viscosity characteristics on the ferrofluid temperature are analyzed.The results indicate that both the viscosity and magnetic properties of the ferrofluid contribute to increased energy dissipation.Under large shaft diameter conditions,the ferrofluid temperature is more sensitive to rotational speed.It is concluded that the ferrofluid temperature is primarily governed by linear velocity.When the operating temperature of the ferrofluid reaches 80℃,the linear velocity should not exceed 18 m/s.Finally,a predictive function for ferrofluid temperature within the linear velocity range of 0～18 m/s is derived.This study provides a theoretical reference for designing ferrofluid sealing devices in helical axial-flow pumps.关键词
铁磁流体/螺旋轴流泵/密封/多场耦合/数值方法/粘度耗散/多相介质输运/热力学特性Key words
ferrofluid/spiral axial flow pump/sealing/multifield coupling/numerical method/viscosity dissipa-tion/multiphase medium transport/thermodynamic characteristics分类
通用工业技术引用本文复制引用
李望旭,李正贵,韩伟,周菊萍,杨涛,朱凌锐..多场耦合作用下螺旋轴流泵磁流体密封热特性[J].哈尔滨工程大学学报,2026,47(2):264-272,9.基金项目
江苏南水北调科技研发项目(JSNSBD202403). （JSNSBD202403）
