CAJ | 학술논문

基于CFD技术,提出了数值预报LNG船薄膜型液舱晃荡压强的方法.流体运动方程由不可压缩的连续方程和N-S动量方程描述,并采用有限体积法进行离散,通过Simple算法求解,其中液体自由表面运动采用VOF技术进行追踪并重构.在中国船舶科学研究中心,以1:55的液舱试验模型为研究对象,开展了试验研究.数值预报结果与试验结果进行了比较,结果显示测点处的压力时间历程与自由液面波形与试验值相当吻合,说明所建立的数值模型可以有效地预报LNG船液舱晃荡载荷.
기우CFD기술,제출료수치예보LNG선박막형액창황탕압강적방법.류체운동방정유불가압축적련속방정화N-S동량방정묘술,병채용유한체적법진행리산,통과Simple산법구해,기중액체자유표면운동채용VOF기술진행추종병중구.재중국선박과학연구중심,이1:55적액창시험모형위연구대상,개전료시험연구.수치예보결과여시험결과진행료비교,결과현시측점처적압력시간역정여자유액면파형여시험치상당문합,설명소건립적수치모형가이유효지예보LNG선액창황탕재하.
@@@@A numerical technique to predict the pressure induced by liquid sloshing in a membrane tank is produced for LNG carrier based on CFD. The motion of incompressible fluid is described by Navier-Stokes equations and continuum equation. The governing equations are discretized by finite volume method and solved by Simple scheme. The profile of liquid surface is reconstructed by the volume of fluid (VOF) tech-nique. A reduced scale (1:55) tank model is used to perform the model test in China Ship Scientific Re-search Center. The numerical results including pressure and free surface profile are compared with the test ones, showing a good agreement. These comparisons show that the presented method is useful to predict the load induced by liquid sloshing for LNG carrier.