喷水推进船获流区流场数值模拟  

Numerical Simulation of Capture Area in Ship Water Jet Propulsion

作　　者：吴琼[1,3] 孙群 韦红刚[1,3] 袁帅 李兆辉 WU Qiong;SUN Qun;WEI Honggang;YUAN Shuai;LI Zhaohui(Marine Design and Research Institute of China,Shanghai 200011,China;Science and Technology on Water Jet Propulsion Laboratory,Shanghai 200011,China;Shanghai Key Laboratory of Ship Engineering,Shanghai 200011,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011 [2]喷水推进技术国防科技重点实验室,上海200011 [3]上海市船舶工程重点实验室,上海200011

出　　处：《中国造船》2023年第3期90-101,共12页Shipbuilding of China

摘　　要：喷水推进是一种特种推进技术,利用吸入与喷出水流的动量差产生推力。在考察船体对喷水推进系统的作用时,通常需要获取进水口前方获流区的动量通量。利用CFD方法对一艘喷水推进三体船模型的自航性能进行模拟,考察船体纵倾、升沉和自由面的影响。采用流量边界条件法对泵的喷射作用进行简化,可提高计算效率。通过流线确定获流区形状,考察获流区进流的动量、动能和边界层影响系数,并与模型试验结果进行比较。在此基础上,对某四泵喷水推进船获流区流场进行数值模拟,考察进速比和流道进口特征对获流区的影响,为四泵喷水推进船舶的设计提供支撑。Water jet propulsion is a kind of special propulsion technology that uses the momentum difference between suction and ejection water flow to produce trust.It is usually necessary to obtain momentum flux on the capture area in front of the intake.CFD was used to simulate the water jet propulsion of a trimaran in model scale,where heave and pitch,and the influence of the water surface were taken into account.The flow boundary condition method is used to simplify injection action of the pump and improve calculation efficiency.Shape of capture area is determined with streamlines.Momentum,kinetic energy and boundary layer influence coefficients in the capture area were investigated and compared with experimental results.On this basis,numerical simulation of the capture area for a four-jet propulsion ship was carried out.Effects of advance ratio and intake characteristics on the capture area were investigated,which would provide support for design of fourjet propulsion.

关 键 词：喷水推进 获流区 动量通量 边界条件方法 CFD 

分 类 号：U664.3[交通运输工程—船舶及航道工程]