内燃机工程2024，Vol.45Issue(5)：82-89,8.DOI:10.13949/j.cnki.nrjgc.2024.05.010
喷油器控制阀微流道可视化试验与仿真研究
Visualization Experiment and Simulation Study on the Microchannel of Injector Control Valve
王晓康 1张旭升 1金立家 1陈萍2
作者信息
- 1. 上海海事大学 商船学院,上海 201306
- 2. 海军工程大学 动力工程学院,武汉 430033
- 折叠
摘要
Abstract
To optimize the control valve hydraulic circuit and address the deviation in fuel injection characteristics and localized structural erosion caused by cavitation,experimental and numerical simulations were conducted on the control valve flow passages.A flow visualiztion study on the two-dimensional(2D)channels of two structural control valves under different pressure differentials by extracting equivalent 2D cross-sections of the fuel injector control valve flow passages.The results indicate that with increasing pressure differential,the flow behavior within the channels transitions from a linear non-cavitation regime to a strongly cavitated regime with stable flow rates.For the channel A,which features a throttling structure and right-angled edges on the cylindrical surface of the ball valve,cavitation inception occurrs within a pressure differential range of 6.22～9.00 MPa.Conversely,cavitation inception occurrs within a pressure differential range of 5.63～8.17 MPa for the channel B,which has no throttling structure and has rounded edges on the cylindrical surface of the ball valve.Cavitation initiation was observed first on the ball valve side at the narrowest point of the channel,followed by the sealing cone side.The localized structure of the sealing surface of the control valve significantly influences cavitation development.Simulation results from computational fluid dynamics indicate better agreement between the simulated cavitation distribution using the k-ω shear stress transport(SST)turbulence model and the Zwart-Gerber-Belamri(ZGB)cavitation model,compared to experimental observations.Minor alterations in the dimensions of the sealing surface and channel width have a significant impact on the initiation position of cavitation.关键词
可视化试验/控制阀/空化/仿真Key words
visualization experiment/control valve/cavitation/simulation分类
能源科技引用本文复制引用
王晓康,张旭升,金立家,陈萍..喷油器控制阀微流道可视化试验与仿真研究[J].内燃机工程,2024,45(5):82-89,8.
