摘要
本文分析了应用导轮装置可将常规螺旋桨尾流能量转换为推进功率的原理,给出了以升力线理论为基础的导轮设计方法。为了检验给出理论公式的实际设计效果,对一条2000t的综合节能船作了螺旋桨/导轮组合推进装置的设计,在空泡水筒内进行了单独螺旋桨和螺旋桨加导轮组合装置的对比模型试验。为了探讨螺旋浆加装导轮后尾流场的变化,在对比模型试验中,用一维大功率激光测速仪进行了尾流轴向和切向速度的测量。试验结果表明,常规螺旋浆加装导轮装置后,确可减少尾流中的能量损失,提高给出实例中的螺旋桨效率达10％,与理论设计预估结果相当一致。
In this paper the principle of applying vane wheel to convert the energy in the slipstream of conventional propeller into propulsive power is analysed and a design method for vane wheel based on lifting line theory is also given. In order to check the practical result of the theoretical design method a comparative test on propeller alone and propeller/vane wheel combined device designed for a 2000 t comprehensive energy saving ship has been carried out in SSSRI cavitation tunnel. To investigate the variation of velocities in propeller slipstream by adding vane wheel behind propeller the axial and tangential components has been measured. The test results indicates that the loss of energy in propeller slipstream is certainly reduced by adding vane wheel. The propulsive efficiency can be increased by 10% in the tested case and this result has good agreement with the theoretical predicted value.
关键词
船舶推进
船舶节能
螺旋桨导轮
ship propulsion, ship energy-saving, propeller, vane wheel
