CAJ | 학술논문

本文采用有限体积法通过求解不可压缩的雷诺平均(RANS)方程数值模拟了包括兴波的三维船体周围的粘性流场,湍流模式使用了子网格尺度模式(SGS)和Baldwin-Lomax模式相结合的混合模式.对于自由表面的处理,采用了任意拉格朗日-欧拉方法,网格为不仅与物体表面贴体,而且与自由表面贴体的动网格,即随着自由表面的变化要不断地重新划分网格.虽然此方法需要很长的计算时间,但能较好地描述船体的兴波情况.本文计算了系列60船模在Fn=0.316,Re=1.9×106时带自由面的粘性流场,计算结果与试验结果吻合较好.
본문채용유한체적법통과구해불가압축적뢰낙평균(RANS)방정수치모의료포괄흥파적삼유선체주위적점성류장,단류모식사용료자망격척도모식(SGS)화Baldwin-Lomax모식상결합적혼합모식.대우자유표면적처리,채용료임의랍격랑일-구랍방법,망격위불부여물체표면첩체,이차여자유표면첩체적동망격,즉수착자유표면적변화요불단지중신화분망격.수연차방법수요흔장적계산시간,단능교호지묘술선체적흥파정황.본문계산료계렬60선모재Fn=0.316,Re=1.9×106시대자유면적점성류장,계산결과여시험결과문합교호.
An finite - volume method solving of incompressible RANS Equations is developed for the numeri-cal simulation of three - dimensional viscous flow with free - surface about a ship. A hybrid turbulence mod-el by combining the sub - grid scale (SGS) model and the Baldwin- Lomax model is used in this pa-per. The arbitrary - Lagrange - Euler formulation is devised for the treatment of free surface boundary condi-tion. The boundary - fitted coordinate system is fitted not only to the ship hull surface but also to the freesurface, so the computational grid is regenerated to follow the free surface deformation. Although this methodneeds spend much longer computational time, but it can fairly display wave pattern made by a ship. The nu-merical simulation has been carried out for viscous flow with free surface past Series 60 ship hull at Fn =0. 316, Re = 1.9 × 106. The computed results are in reasonable agreement with experimental measure-ments.