CAJ | 학술논문

为了研究三体滑行艇在高航速下的纵向运动稳定性,利用重叠网格技术对三体滑行艇在失稳时产生的"海豚运动"现象进行CFD仿真.根据艇底的压力分布特征分析了发生"海豚运动"的机理;利用二分法制定了若干计算工况,得到静水航行时的稳定速度上限线和失稳速度下限线,实现了对纵向稳定性界限曲线的逼近.将数值计算结果与模型试验结果进行对比分析,计算值与实验值吻合较好,表明该数值方法具有较好的实用价值.
위료연구삼체활행정재고항속하적종향운동은정성,이용중첩망격기술대삼체활행정재실은시산생적"해돈운동"현상진행CFD방진.근거정저적압력분포특정분석료발생"해돈운동"적궤리;이용이분법제정료약간계산공황,득도정수항행시적은정속도상한선화실은속도하한선,실현료대종향은정성계한곡선적핍근.장수치계산결과여모형시험결과진행대비분석,계산치여실험치문합교호,표명해수치방법구유교호적실용개치.
The porpoising phenomenon of planing trimaran lacking of stability is numerically simulated by the overset mesh technology to study the longitudinal motion stability of the planing trimaran with high speed. The mechanism of porpoising is studied based on the bottom pressure distribution. Several operation conditions established by dichotomy algorithm are used to obtain the upper limit of stable velocity and the lower limit of instable velocity in still water, approaching the limit curve of longitudinal stability. It is found that the computational results are in good agreement with the experimental results by comparison between the numerical calculations and mode tests. It shows that the numerical method can provide practical values.