CFD Analysis Of Fluid Flow Inside The Spool Valve At Unsteady Modes

2018 Global Fluid Power Society PhD Symposium (GFPS) Pub Date : 2018-07-01 DOI:10.1109/GFPS.2018.8472361

O. Zalogin, A. Noskov, Aleksey Cherevatov

{"title":"CFD Analysis Of Fluid Flow Inside The Spool Valve At Unsteady Modes","authors":"O. Zalogin, A. Noskov, Aleksey Cherevatov","doi":"10.1109/GFPS.2018.8472361","DOIUrl":null,"url":null,"abstract":"The harmonic linearization method (dithering) is widely used in hydraulic servo systems; however, generated longitudinal oscillations of the spool result in unsteady hydrodynamic processes in spool valve throttle gap and change the structure of the flow that influences metering characteristics. The article deals with study of throttle gap flow structure in non-stationary conditions. The study was conducted by using a two-dimensional CFD model based on dynamic meshes in the ANSYS Fluent software package at various values of the spool valve oscillation frequencies. CFD model was successfully validated against experimental data from the literature. The results of numerical study of flow structure and flow parameters (such as the coefficient of jet contraction, the pressure diagram along a flow line) in the throttle gap are presented. The frequency dependence of the phase shift magnitude of volumetric flow rate oscillation relative to the harmonic valve oscillation is determined. Obtained model can be used for development of the refined one-dimensional mathematical model and simulation model of specified type devices","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 Global Fluid Power Society PhD Symposium (GFPS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/GFPS.2018.8472361","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 3

Abstract

The harmonic linearization method (dithering) is widely used in hydraulic servo systems; however, generated longitudinal oscillations of the spool result in unsteady hydrodynamic processes in spool valve throttle gap and change the structure of the flow that influences metering characteristics. The article deals with study of throttle gap flow structure in non-stationary conditions. The study was conducted by using a two-dimensional CFD model based on dynamic meshes in the ANSYS Fluent software package at various values of the spool valve oscillation frequencies. CFD model was successfully validated against experimental data from the literature. The results of numerical study of flow structure and flow parameters (such as the coefficient of jet contraction, the pressure diagram along a flow line) in the throttle gap are presented. The frequency dependence of the phase shift magnitude of volumetric flow rate oscillation relative to the harmonic valve oscillation is determined. Obtained model can be used for development of the refined one-dimensional mathematical model and simulation model of specified type devices

查看原文本刊更多论文

非定常滑阀内部流体流动的CFD分析

谐波线性化方法(抖动)广泛应用于液压伺服系统;然而，阀芯产生的纵向振荡导致滑阀节流间隙内的非定常流体动力过程，改变了流量结构，影响了计量特性。本文对非平稳工况下的节流间隙流动结构进行了研究。利用ANSYS Fluent软件中基于动态网格的二维CFD模型，在滑阀振荡频率的不同取值下进行了研究。根据文献中的实验数据成功地验证了CFD模型。给出了节流间隙内流动结构和流动参数(如射流收缩系数、沿流线压力图)的数值研究结果。确定了容积流量振荡相移幅度相对于谐波阀振荡的频率依赖性。所得模型可用于建立特定类型器件的精细化一维数学模型和仿真模型

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2018 Global Fluid Power Society PhD Symposium (GFPS)

自引率

0.00%

发文量