摘要
为研究结构参数对巡航状态下泵喷推进潜艇水力性能和声学性能的影响,采用分离涡模型(DES)进行全流域非定常数值计算,输出流场脉动信息作为声源,运用声学有限元方法(FEM)预测流动噪声。在水槽试验台进行试验研究,采集噪声与推力信息,并对数值计算的结果进行验证。结果表明:较少的叶轮叶片数、导叶叶片数和较小的喷管进出口面积比有利于泵喷内部流动状况改善;泵喷总推力随叶轮叶片数或导叶叶片数的增加而降低、随喷管进出口面积比的增加而上升,敞水效率均随3种结构参数的增加而降低;叶轮叶片数增加引起各类流动噪声均呈现整体上升趋势,而导叶叶片数和喷管进出口面积比增加对不同噪声的影响规律各有不同;结构参数改变时,各类流动噪声的指向性分布规律基本一致。
In order to study the influence of structural parameters on the hydraulic and acoustic performance of a pump-jet propelled submarine in cruising condition,the DES(detached eddy simulation)was used to calculate the unsteady flow in the whole basin.The pressure fluctuation or velocity fluctuation of the flow field was output as the sound source,and the acoustic FEM(finite element method)was used to predict the flow noise.The experimental study was carried out on the circulating water channel of Lanzhou University of Technology.The noise and thrust information were collected by hydrophone and thrust data acquisition system,and the numerical results were verified.The results showed that fewer impeller and guide vane number and less area ratio of nozzle import and export can improve the internal flow condition of pump-jet.The total thrust of pump-jet propulsor decreased with the increase of the number of impeller blades or the number of guide vane blades,but increased with the increase of the area ratio of nozzle import and export.The open water efficiency decreased with the increase of three structural parameters.The increase of impeller blades number caused all kinds of noise to show an overall upward trend,while the increase of different kinds of guide vane number and area ratio of nozzle import and export showed different influence laws on different kinds of noise.When the structural parameters changed,the directivity distribution of various flow noises was basically the same.
作者
郭荣
李舟睿
张人会
王乾年
罗鑫
GUO Rong;LI Zhourui;ZHANG Renhui;WANG Qiannian;LUO Xin(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Province Key Laboratory of Fluid Machinery and Systems,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《航空动力学报》
北大核心
2025年第6期318-329,共12页
Journal of Aerospace Power
基金
国家自然科学基金(52009050)
中央引导地方科技发展资金项目(23ZYQA0320)
兰州理工大学红柳优秀青年人才支持计划项目。
关键词
泵喷推进潜艇
结构参数
水力性能
声学性能
喷流
pump-jet propelled submarine
structural parameters
hydrodynamic performance
acoustic performance
jet-flow
