船用桨后固定组合叶轮节能效果研究

船用桨后固定组合叶轮是一种新型螺旋桨节能装置。为了解其节能机理并验证节能效果,基于计算流体力学(CFD)方法对该问题进行研究。首先选用B4-65螺旋桨进行敞水数值模拟,验证计算模型和方法的正确性;然后重点对螺旋桨在加装桨后固定组合叶轮后的水动力性能进行模拟。结果表明:桨后固定组合叶轮能够较好地削弱螺旋桨后方的梢涡与毂涡,回收尾流能量。而且该节能装置能与螺旋桨产生有利干扰,增加桨叶上的推力。在低进速区(J0.4)时,该节能装置能达到2%以上的节能效果。

Numerical simulation on energy-saving effect of marine post-propeller combined-blade stator

This paper proposes a new type of marine post-propeller energy-saving device, which is called combined-blade stator. The Computational Fluid Dynamics (CFD) method is used to investigate the energy-saving mechanism and validate its energy-saving effect. Firstly, it carries out the simulation of the open water performance of a B4-65 propeller for the validation of numerical models and approaches. Then it mainly focuses on the simulation of its hydrodynamic performance with the installation of the Combined-blade Stator. The simulation results show that the Combined-blade Stator can effectively weaken the propeller tip and hub vortices to recycle wake energy. Moreover, the thrust of the propellers increases as a result of the favorable interference between the energy-saving devices and the propellers. It can earn 2%profit in case of low inflow velocity coeffcient(J<0.4).