尾压浪板升力研究及其对WPC耐波性的影响

摘要

尾压浪板出现近半个世纪，较好改善了船舶性能。尾压浪板受到方尾、自由液面及鸡尾流的影响，其水动力性能极其复杂。目前大多数资料是试验探索而无理论方面的研究。采用势流理论，考虑方尾、自由液面及鸡尾流的影响，对尾压浪板升力系数斜率和零升力攻角进行研究，推导的公式和试验结果吻合良好。试验和计算表明：升力中心在船体上，升力系数斜率随Fr增加而减小，Fr>0.5左右趋于稳定；零升力攻角随Fr增加而减小，对升力系数影响较大，低速可达-19°，高速可达-6°。研究结果用于穿浪双体船(WPC)耐波性研究，尾压浪板对垂荡几乎没有影响，可减少纵摇约10%。%Considering the influence of transom stern, free surface and rooster tail, formulas about lift coefficient slope and zero lift angle are derived with potential flow theory and coincident with experiment. Experiments and calculations show that lift center is on the vessel, while lift coefficient slope decreases with the increase of Fr and then keeps steady when Fr > 0.5; zero lift angle decreases with the increase of Fr, which has a significant effect on lift coefficient. The flap has negligible effect on heave, but can reduce pitch by 10%. The research results will be applied to seakeeping of wave-piercing catamaran (WPC).