流体机械2024，Vol.52Issue(9)：66-73,8.DOI:10.3969/j.issn.1005-0329.2024.09.009
浸没式喷水推进器壳体阻力特性及内部回流研究
Research on resistance characteristics and internal backflow of submerged waterjet propeller duct
摘要
Abstract
In order to analyze the resistance characteristics of a typical submerged waterjet propeller duct under the structure of individual duct and integrated structure of hull and duct,and examine the effect of vortex generators on improving internal flow separation,the analysis was focused on the effects of installation direction and angle of the vortex generator on flow control.The results show that the pressure loss coefficient of the duct increases from 3.42 to 3.73 under an incoming flow condition of 15 m/s due to the significant influence of the hull bottom structure on resistance characteristics after the duct and hull are integrated.Divergently arranged vortex generators effectively suppress the flow separation in the top part inside the duct and reduce the pressure loss resistance on the duct's external wall by 58.4%,thereby significantly improving the duct's resistance performance.An appropriate installation angle of 15° for the vortex generators not only can control internal flow separation,but also enhance the duct's resistance performance while maintaining uniformity of flow field at the inlet.These findings provide a theoretical basis for the design of submerged waterjet propulsion systems.关键词
浸没式喷水推进/壳体阻力特性/内部流动分离/涡流发生器Key words
submerged waterjet propulsion/drag characteristics of duct/flow separation inside the duct/vortex generator分类
机械制造引用本文复制引用
王一璠,王海民..浸没式喷水推进器壳体阻力特性及内部回流研究[J].流体机械,2024,52(9):66-73,8.基金项目
国家自然科学基金项目(52276034) （52276034）
