小水线面双体船阻力预报研究

小水线面双体船(SWATH)船型设计的关键技术之一是其水动力性能的预报,而其静水阻力预报是其水动力性能预报的重要内容.本文应用船舶计算流体动力学(CFD)技术并结合传统的阻力估算方法,开发了一个SWATH船型阻力数值预报集成软件系统.为了验证该系统的有效性,将其应用于一SWATH船型的总阻力和有效功率计算,并将计算结果和现有的船模试验结果进行了比较.结果表明,本文所开发的SWATH阻力预报系统可以很好地预报SWATH船型阻力随航速的变化规律以及阻力曲线峰、谷点的位置;在傅汝德数小于0.45的速度范围内,计算得到的总阻力和试验结果吻合良好.

A Research on Resistance Prediction of SWATH Ships

One of the key techniques in SWATH design is the prediction of the hydrodyna mic performances, whereas resistance prediction is the most important task of hy drodynamic performance prediction. By applying the CFD technique and the convent ional estimation methods, a resistance prediction system for SWATH is developed in this paper. The system is applied to predict the total resistance and effect ive power of a SWATH at different ship speeds. The predicted results are compar ed with the available experimental ones. It is shown that the system can well pr edict the tendency of the resistance change with the speed, including the positi ons of the humps and hollows in the resistance curves. At the speed range of Fro ude number less than 0.45 the agreement of resistance prediction results with ex perimental ones is satisfactory.