摘要
自振空化射流是在射流过程中利用喷嘴内部结构的振荡特性产生空泡,在射出喷嘴后空泡发生溃灭来增大射流冲击作用的现象。由于自振空化射流效果与喷嘴结构有密切关系,因此近年来关于喷嘴结构的优化研究广受关注。鉴于Helmholtz喷嘴在增强射流冲击力方面具有明显优势,该文针对不同结构参数的Helmholtz喷嘴的内外流场进行了数值仿真,重点分析了出口直径、出口长度、共振腔空化长度、共振腔空化直径等关键结构参数及射流靶距对空化水射流效果的影响,相关研究成果可为空化射流船舶清洗技术提供理论指导。
Self-oscillating cavitating jet is a phenomenon in the process of jet flow. The cavitation is produced by the oscillation characteristics of the internal structure of the nozzle. And the cavitation collapses after it is ejected from the nozzle, which enhances the impact force of the water jet. The selfoscillating cavitating jet effect is related to the nozzle structure. Since Helmholtz nozzle has great advantage in enhancing the jet impacting force, this paper investigates the flow fields inside and outside of the Helmholtz nozzle with different structural parameters based on numerical simulation, and this paper mainly analyzes the influence of some key structural parameters, including the outlet diameter, the outlet length,the resonant cavitating length, the resonant cavitating diameter and the target distance, on the cavitating jet performance, and the results can provide a theoretical instruction for the applications like the caviating jet technology in ship cleaning.
作者
张飞飞
韦亚南
徐耀辉
何凯
ZHANG Feifei;WEI Yanan;XU Yaohui;HE Kai(Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China)
出处
《集成技术》
2021年第2期75-84,共10页
Journal of Integration Technology
基金
广东省海洋经济发展(海洋六大产业)专项资金项目(粤自然资合[2020]031号)。
