中国机械工程2017，Vol.28Issue(4)：492-496,5.DOI:10.3969/j.issn.1004-132X.2017.04.019
汽车液压制动系统气液两相流流型的识别
Identification of Gas-liquid Two-phase Flow Patterns in Automobile Hydraulic Braking Systems
摘要
Abstract
A test rig was completed for gas-liquid two-phase flow pattern identification in automo-bile hydraulic braking system,where the gas-liquid two-phase flow patterns were identified by Hilbert-Huang transform(HHT)using the pressure differential signals,and the flow patterns of brake fluid were also acquired in the braking pipes by a high speed camera under the different conditions.Results show that as improving the braking speed,the amplitudes of pressure differential signals are higher, which are at the frequency distribution area of 0~50 Hz.The flow patterns of brake fluid were identi-fied as a bubble flow during braking.The photos also show that the brake fluid is a bubble flow in hy-draulic braking pipelines,and the sizes of bubbles are smaller as the rotating speed increasing.This paper discloses the gas-liquid two-phase flow patterns in automobile braking system during braking, and also gives a method on identifying the flow patterns by HHT only using the pressure differential signals of brake liquid.关键词
制动系统/气液两相流/流型/压差信号Key words
braking system/gas-liquid two-phase flow/flow pattern/pressure differential signal分类
交通工程引用本文复制引用
李孝禄,梁思伟,王文越,赵进慧,朱俊江,李运堂..汽车液压制动系统气液两相流流型的识别[J].中国机械工程,2017,28(4):492-496,5.基金项目
国家自然科学基金资助项目(51275499) （51275499）
浙江省自然科学基金资助项目(LY14E050023) （LY14E050023）
