旋转式水力空化发生器的空化特性  

Cavitation characteristics of rotational hydrodynamic cavitation generator

作　　者：王勇[1,2] 张国翔[2] 刘厚林 肖亚东[3] 李刚祥 李明 WANG Yong;ZHANG Guoxiang;LIU Houlin;XIAO Yadong;LI Gangxiang;LI Ming(Department of Precision Manufacturing Engineering,Suzhou Vocational Institute of Industrial Technology,Suzhou,Jiangsu 215104,China;National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China;ROS Offshore(Shanghai)Ltd.,Shanghai,201206,China)

机构地区：[1]苏州工业职业技术学院精密制造工程系,江苏苏州215104 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [3]阿奥艾斯海洋工程(上海)有限公司,上海201206

出　　处：《排灌机械工程学报》2023年第2期160-165,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51779106)。

摘　　要：为综合考虑水力空化发生器的空化强度和输送能力,基于一台比转数为117.3的单级单吸式离心泵,设计出一种能够兼顾空化和扬程的旋转式水力空化发生器.基于CFX软件对旋转式水力空化发生器内部空化形态变化和空泡演变规律进行研究.结果表明,随着进口压力的降低和流量的增加,旋转式空化发生器的空泡团体积增大;在转轮挡板和隔舌附近均有空泡产生,转轮内部空泡首先在挡板侧面产生,然后在其背面靠近隔舌处开始脱落,隔舌处空泡在隔舌下游初生,并与转轮空泡同时脱落,两者具有不同的溃灭周期.该旋转式水力空化发生器提高了空化发生装置的集成化程度,具有空化效果好、且能有效增加液体静压的特性,对其空化特性的研究可以为水力空化发生装置的设计提供参考.Considering the hydrodynamic cavitation intensity and pumping liquid, based on a single-stage single-suction centrifugal pump with specific speed of 117.3, a new type of rotational hydrodynamic cavitation generator was designed. The CFX software was used to analyze the cavitation pattern and the law of cavities evolution of the rotational hydrodynamic cavitation generator. The results show that the cavitation groups of the rotational hydrodynamic cavitation generator can enlarge with decreasing inlet pressure and increasing flow rate. The cavities initiate around barricades and the tongue, the cavities in rotator initiate at the side of barricades and fall off behand the barricades close to tongue, the cavities near tongue fall off at the same time with the vapors behand barricades, however, they have different collapse periods. This novel rotational hydrodynamic cavitation generator improves the level of integration and has good cavitation effect and high head. The study of cavitation characteristics can provide a reference for hydrodynamic cavitation generator design.

关 键 词：旋转式水力空化发生器 水力空化 数值模拟 空化形态 空泡演变 

分 类 号：S273.5[农业科学—农业水土工程] TK79[农业科学—农业工程]