重庆大学学报2016，Vol.39Issue(4)：96-102,7.DOI:10.11835/j.issn.1000-582X.2016.04.012
前混合磨料射流磨料速度测试的新方法
A novel method to measute the velocity of ptemixed abtasive j et
摘要
Abstract
Absttact:The ultra-intense hitting power of abrasive water j et is mainly provided by high-speed abrasives.So measuring the abrasive velocity is the base to research the hitting power and the erosion mechanism.To overcome the shortcomings of traditional research methods,a new testing method was proposed.The method uses the PIV(particle image velocimetry)combined with center recognition program to gain the abrasive velocity,and can test the high velocity of abrasive jet without contacting.Furthermore, the influence law of nozzle structure on the abrasive velocity was proceeded with this method.The results show that increasing the length of straight segment in a certain range is conducive to improve the abrasive velocity,because the abrasives were in the state of obvious accelerated motion in the end of the straight segment.Increasing the length of convergence section in a certain range is conducive to improve the abrasive velocity,but the increase amplitude is not very large.When the convergence angle is too large,liquid phase accelerates slowly in the first half of convergence section but accelerates sharply in the second half of convergence section.Then the acceleration of abrasives lags behind that of liquid phase,and thus the abrasive velocity is decreased.关键词
前混合磨料射流/磨料速度/PIV/图像识别Key words
premixed abrasive j et/abrasive velocity/PIV/image recognition分类
矿业与冶金引用本文复制引用
左伟芹,卢义玉,刘明举,郝富昌,白亚鹏..前混合磨料射流磨料速度测试的新方法[J].重庆大学学报,2016,39(4):96-102,7.基金项目
国家自然科学基金资助项目（51404099）；武汉大学水射流理论与新技术湖北省重点实验室开放课题资助项目（HBKLWJ-2014F04）；国家安全监管总局安全生产重大事故防治关键技术资助项目（henan-0037-2014AQ）。Supported by the National Natural Science Foundation of China（51404099），Open Subject of Key Laboratory of Hubei Province for Waterjet Theory ＆ New Technology（HBKLWJ-2014F04）and Key Technology Project in Major Accident Prevention and Control of State Administration of Work Safety （henan-0037-2014AQ）． （）
