Coupling of RANS and BEM Solvers for Simulation of Propeller Behind the Hull in Full Appended Model  

作　　者：Saeed NAJAFI Mehdi POURMOSTAFA LIU Peng-fei 

机构地区：[1]Iranian National Institute for Oceanography and Atmospheric Science(INIOAS),Tehran 14155-4781,Iran [2]Department of Maritime Engineering,Amir Kabir University of Technology,Tehran 15875-4413,Iran [3]Marine,Offshore and Subsea Technology,School of Engineering,Newcastle University,Newcastle upon Tyne,NE17RU,UK

出　　处：《China Ocean Engineering》2024年第3期424-438,共15页中国海洋工程（英文版）

摘　　要：To design a propeller for ship power plant,the interaction between ship hull and propeller must be taken into account.The main concern is to apply the wake effect of ship stern on the propeller performance.In this paper,a coupled BEM(Boundary Element Method)/RANS(Renolds-Averaged Navier−Stokes)solver is used to simulate propeller behind the hull in the self-propulsion test.The motivation of this work is to develop a practical tool to design marine propulsion system without suffering long computational time.An unsteady boundary element method which is also known as panel method is chosen to estimate the propeller forces.Propeller wakes are treated using a time marching wake alignment method.Also,a RANS code coupled with VoF equation is developed to consider the ship motions and wake field effects in the problem.A coupling algorithm is developed to interchange ship wake field to the potential flow solver and propeller thrust to the RANS code.Based on the difference between hull resistance and the propeller thrust,a PI controller is developed to compute the propeller RPM in every time step.Verification of the solver is carried out using the towing tank test report of a 50 m oceanography research vessel.Wake factor and trust deduction coefficient are estimated numerically.Also,the wake rollup pattern of the propeller in open water is compared with the propeller in real wake field.

关 键 词：RANS BEM coupled method ship propeller SELF-PROPULSION wake sheet pattern 

分 类 号：U664.33[交通运输工程—船舶及航道工程]