摘要
基于Eulerian-Eulerian非均相流模型对来流含气条件下喷水推进器叶轮内涡结构分布进行数值分析,发现由于进流中存在气相介质,使得叶轮中涡量分布较纯水中发生改变。在旋转效应和形变效应影响下,气相介质表面与内部的涡旋方向相反,随着航速升高,流道内流动状态趋于稳定,高涡量分布区域逐渐减少。在瞬态数值计算中,运用Ω涡识别方法发现气相介质的存在会使得叶顶泄漏涡强度和大小发生改变,尾缘涡较纯水中出现明显延展现象。由此说明喷水推进器在来流含气条件运行时,叶轮内涡结构的产生和发展会受到气相介质影响。
Based on Eulerian-Eulerian heterogeneous flow model,the vortex structure distribution in the impeller of the water jet propeller is numerically analyzed with air in the inlet flow.It is found that the vorticity distribution in impeller is different from that in pure water due to the existence of gas phase medium in the inlet flow.Due to the effect of the rotation and shear,the direction of vorticity on the surface of gas-phase medium is opposite to that of the inner vortex.With the increase of ship speed,the flow state in the passage tends to be stable,and the distribution area of high vorticity gradually decreases.In the transient numerical calculation,the Ω vortex recognition method is used to find that the presence of gas phase media will change the intensity and size of tip leakage vortex.Compared with pure water,trailing edge vortex is obviously extended.The results show that the generation and development of vortex structure is effected by the gas phase in the impeller when the water jet propeller is running with air in the inlet flow.
作者
熊文翰
潘中永
方玉建
刘月伟
吴旭
XIONG Wenhan;PAN Zhongyong;FANG Yujian;LIU Yuewei;WU Xu(Research Center of Fluid Machinery Engineer and Technology,Jiangsu University,Zhenjiang 212013,Jiangsu,China;National Water Pump Product Quality Inspection and Testing Center(Zhejiang),Wenling,317599,Zhejiang,China;Jiangsu Zhongke Research Center for Clean Energy and Power,Lianyungang,222000,Jiangsu,China)
出处
《船舶工程》
CSCD
北大核心
2023年第3期73-80,165,共9页
Ship Engineering
基金
国家自然科学基金(51879120)。
关键词
喷水推进器
来流含气
数值分析
涡结构
Ω涡识别方法
waterjet propulsor
gas-liquid two phase flow
numerical analysis
vortex structure
identification method ofΩvortex
