结构尺寸对两级式厚壁阻尼孔流动特性的影响  

The Influence of Structural Dimensions on the Flow Characteristics of Two-stage Thick Orifices

作　　者：高军霞[1] 吴凤和[2] GAO Junxia;WU Fenghe(Key Lab of Intelligent Equipment Digital Design and Process Simulation,Tangshan University,Tangshan,Hebei 063000;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004)

机构地区：[1]唐山学院河北省智能装备数字化设计及过程仿真重点实验室,河北唐山063000 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《液压与气动》2024年第11期172-180,共9页Chinese Hydraulics & Pneumatics

基　　金：唐山市科技计划项目(22130211G)。

摘　　要：目前,两级式阻尼孔的设计使用是参考单级式阻尼孔的流量计算公式以及经验参数,选型误差较大,依靠现场实验去修正压损参数或者采用试错法更换不同尺寸的阻尼孔进行效果补偿。结合实验和CFD仿真深入研究了气穴、不同长径比及加工误差等因素对两级式厚壁阻尼孔流动特性的影响,得到了有或无气穴现象时固定长度、不同直径尺寸的阻尼孔流量系数稳定值,为两级式厚壁阻尼孔正确选型及数学建模中的特征参数设置提供依据。At present,the design or use of two-stage orifices are based on the flow calculation formula or empirical parameters of classic single-stage orifices,with significant selection errors.It is necessary to rely on on-site experiments to correct pressure loss parameters or use trial and error methods to replace orifices of different sizes for effect compensation.This research combines experiments and CFD simulations to investigate the influence of factors such as cavitation,different aspect ratios,and machining errors on the flow characteristics of two-stage thick orifices.The stable flow coefficients of orifices with or without cavitation are obtained for fixed length and different diameter sizes,providing a basis for the correct selection of two-stage thick orifices and the setting of characteristic parameters in mathematical modeling.

关 键 词：厚壁阻尼孔 流动特性 气穴现象 CFD仿真 

分 类 号：TH137[机械工程—机械制造及自动化]