淹没磨料射流的空蚀能力分析  

Cavitation capacity of submerged abrasive water jets

作　　者：向文英[1] 李晓红[2] 卢义玉[2] 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400030 [2]重庆大学资源与环境科学学院,重庆400030

出　　处：《重庆大学学报（自然科学版）》2009年第3期299-302,共4页Journal of Chongqing University

基　　金：国家自然科学工作者基金资助项目(50604019);国家自然科学基金专项创新研究群体基金资助项目(50621403)

摘　　要：淹没磨料射流的空蚀能力决定着磨料射流在水下切割能力的强弱。采用高压密闭容器模拟水下环境,利用磨料射流系统、数码摄像系统,实验研究了淹没磨料射流的紊流特性,进行了空蚀能力的理论分析。探讨了淹没磨料射流紊流系数随泵压、围压的变化规律。研究表明,文丘里型空化喷嘴的射流系统中,相同条件下,5 MPa以上淹没磨料射流的空化数较纯水空化射流大,磨料的存在使淹没磨料射流空蚀能力降低。The incising ability of abrasive wa＇ter jets submerged under water depend on their erosive capability. The turbulent flow characteristics of submerged abrasive water jets is experimented with using a system of abrasive water jets in a high-pressure obturation container and a numeric photography system. The erosive capability of submerged abrasive water jets also is analyzed theoretically. We discuss the turbulence coefficient changes at various pump and ambient pressures. The results show that, under identical conditions, the extent of cavitation of submerged abrasive water jets exceeds that of cavitation water jets when the pressure is more than 5 MPa in a Wenqiu cavitation nozzle system. The cavitation ability of submerged abrasive water jets decreases due to the existence of abrasive particles.

关 键 词：紊流 淹没磨料射流 空化 空蚀能力 

分 类 号：TU443[建筑科学—岩土工程]