垂直船首对提高推进性能的效果探讨

在研究了传统的船首形状及性能效果后，发现由于受种种制约因素的限制，船首一般比较肥大，主船体产生的兴波很大，相对而言，球鼻首产生的干涉波比较弱．因此，经过干涉后降低的兴波阻力是有限的，兴波阻力占总阻力的比重仍然很高．为了研究更好的船首形状以降低阻力，获得良好的推进性能，提出了垂直船首的设想．将首垂线延伸到船的最前端，改变了船首水线面形状和球鼻首．利用CFD摸拟分析了垂直船首对推进性能的影响，并做了模型试验．试验发现垂直船首的船模首部兴波明显改善，兴波阻力大幅降低，显著地提高了推进性能，同时也提高了经济效益和环保效益．

Research on Vertical Stem to Improve Propulsive Performance

Basing on the research on traditional stem and it's propulsive performance,we find the stem is fat due to many limit effects. The wave at fore caused by main hull is obviously,but the interferential wave made by bulb bow is weak. Hence,the reduced wave making resistance due to interference is unobvious,the wave making resistance still is in big percentage of total resistance. To improve the lines of stem so as to obtain good propulsive,we raise a new idea of vertical stem. The fore perpendicular is shifted ...