摘要
在干气密封的理论研究与设计计算过程中,一般都是基于层流流动假设下进行的,但随着密封运行工况渐趋于高参数化、工艺介质多相化,在高参数、极端复杂工况下时流体会处于湍流流动状态,传统的层流流动理论就变得不再适用,因此在干气密封的理论设计与研究中就需要考虑润滑气体的湍流效应。总结现今应用较为广泛的3种湍流润滑模型,即Constantinescu模型、Ng-Pan-Elrod模型和Hirs模型,并介绍各模型的理论基础与适用范围。对湍流润滑方程及其在不同模型下的湍流系数表达式进行说明,综述考虑湍流效应对干气密封稳、动态性能影响的国内外研究进展。
The theoretical research,design and calculation of dry gas seal is generally based on the assumption of laminar flow.However,as the sealing operating conditions gradually become highly parameterized and the process medium becomes multiphase,the fluid will be in a turbulent flow state under high parameter and extremely complex working conditions,and the traditional laminar flow theory will no longer be applicable.Therefore,the turbulent effect of lubricating gas should be considered in the theoretical design and research of dry gas seals.Three widely used turbulent lubrication models,namely Constantinescu model,Ng-Pan-Elrod model and Hirs model,were summarized,the theoretical basis and applicability of each model was described.The turbulent lubrication equation and its turbulent coefficient expression under different models were explained,and the research progress at home and abroad considering the influence of turbulence effects on the stability and dynamic performance of dry gas seals was reviewed.
作者
丁雪兴
蒋海涛
徐洁
严如奇
丁俊华
DING Xuexing;JIANG Haitao;XU Jie;YAN Ruqi;DING Junhua(College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou Gansu 730050,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2023年第8期188-195,共8页
Lubrication Engineering
基金
国家重点研发计划项目(2020YFB2010001)
兰州理工大学研究生科研探索项目。
关键词
干气密封
湍流润滑
密封性能
湍流效应
动态性能
dry gas seal
turbulent lubrication
sealing performance
turbulence effect
dynamic performance
