摘要
对于高速航行的舰船，由于其航行姿态变化明显，因而以设计浮态为基准的阻力理论计算结果并不能准确预报其实际航行阻力。基于RANS方程，划分多块结构化网格，采取一种简化的迭代方法对高速舰船的阻力进行数值计算，当傅氏数在O．15～0．44之间时，阻力计算结果与船模试验值相比误差均保持在5％以内。结果表明，该方法充分考虑了船体姿态的影响，对提高高速舰船的阻力预报精度具有一定的可行性。同时，分析了不同傅氏数下的自由表面波形图和波形等值线图，以及艏艉兴波随航速的变化趋势，结果显示符合试验规律。
Since the motion attitude may experience significant variation when the vessels are traveling at high speed, the conventional approach for numerical resistance prediction, which is based on the ship floa- ration, is no longer valid in such a condition. Aiming at the problem, this paper employs a multi-block structured grid and a simplified iteration method to numerically calculate the surface resistance of high speed vessels. Meanwhile, the proposed approach takes full account of the sinkage and trim during the cal- culation. Results show that the error is limited to 5% when the Froude-number takes the value between 0.15 and 0.44, compared with that from the model test data. Also, the waveform and wave contour of the free surface with different Froude-numbers are analyzed, where the wave variation tendency at the stem agrees well with the classical laws.
出处
《中国舰船研究》
2013年第2期34-40,共7页
Chinese Journal of Ship Research
关键词
高速船
航态
阻力
迭代方法
船模试验
high speed vessel
voyage gesture
resistance
iteration method
model test
