局部气垫双体船阻力与航态性能试验研究

Experimental study on resistance and navigation state of partial air cushion support catamaran

为验证局部气垫双体船的航行性能,对其阻力特性和航态性能进行试验研究.基于船模试验测量了其在不同排水量和不同重心条件下的阻力值、升沉幅值以及纵倾角度,分析了阻力、航态等特性随进气流量的变化规律.结果表明:当气垫长度傅汝德数小于0.8时,船体阻力随气垫进气流量减小而降低,并且此时的越峰能力较强;当船速增加时,船体阻力随气垫进气流量增加而降低.重心位置适当后移能有效改善船体表面的阻力特性.船型特有的滑行壁面能使其越峰后快速达到滑行状态,保证越峰后的快速性和纵向稳定性.

To verify the sailing performance of partial air cushion support catamaran（Pacscat）,the resistance characteristic and navigation state of the Pacscat were investigated.Based on model tests,the values of resistance,heave and trim in different displacements and center of gravity locations were measured and then the change law of Pacscat′s resistance and navigation state was obtained.The results show that when the air cushion Froude number is less than 0.8,hull resistance will decrease with inflatable flow of air cushion and the resistance peak will be reduced and appear advance meanwhile.On the contrary,when the speed is larger,hull resistance will decrease with inflatable flow of air cushion′s increasing.Meanwhile,the Pacscat′s resistance performance will be improved by the increasing of longitudinal center of gravity.In addition,after crossing the peak,the Pacscat can reach the planning condition immediately with better rapidity and longitudinal stability for the special planning surface.