CAJ | 학술논문

文章基于RANS方程，对计及自由面影响的双桨转动情况下的舰船旋臂试验（RAT）粘性流场数值模拟方法进行了研究。在旋臂试验的数值模拟中，根据旋臂试验的特点，采用分区混合网格，结合MRF方法和滑移网格方法，解决船体圆运动及螺旋桨定轴旋转运动的叠合难题。文中以ITTC推荐的MARIN model no.7967船模为对象，对其在四组转动半径下的旋臂试验进行了数值计算，并将结果与权威水池试验结果进行了对比，吻合良好。文中提出的方法可获得全附体船模旋转流场水动力性能参数，可以较真实地模拟其流场特性，获取包括船-舵-桨干扰在内的流场信息。该文的工作是可行的、有效的，可为深入研究舰船自由旋回试验及非定常操纵运动的数值模拟提供基础。
문장기우RANS방정，대계급자유면영향적쌍장전동정황하적함선선비시험（RAT）점성류장수치모의방법진행료연구。재선비시험적수치모의중，근거선비시험적특점，채용분구혼합망격，결합MRF방법화활이망격방법，해결선체원운동급라선장정축선전운동적첩합난제。문중이ITTC추천적MARIN model no.7967선모위대상，대기재사조전동반경하적선비시험진행료수치계산，병장결과여권위수지시험결과진행료대비，문합량호。문중제출적방법가획득전부체선모선전류장수동력성능삼수，가이교진실지모의기류장특성，획취포괄선-타-장간우재내적류장신식。해문적공작시가행적、유효적，가위심입연구함선자유선회시험급비정상조종운동적수치모의제공기출。
A combination of methods was developed to account for the viscous flow over a hull with twin-propellers and twin-rudders in Rotating Arm Tests. Firstly, an Reynolds averaged Navier-Stokes method (RANS) is used to determine hydrodynamic forces on a hull in this unsteady motion. Secondly, volume of fluid method (VOF) is devised for the treatment of free surface. Finally, the Moving Mesh method was ap-plied to simulate the twin-propellers’ rotation movement, and the Multiple Reference Frame (MRF) method was used to simulate the hull’s circular motion. Cased studies involving the MARIN model NO.7967 which was recommended by ITTC were run on four different radiuses (from 13.42 m to 22.682 m). These show that the suggested method is efficient and capable, with results that are in good agreement with experimental data.