导管螺旋桨敞水性能数值计算方法研究

为实现快速预报导管螺旋桨敞水性能曲线，利用 CFD流体计算软件对导管螺旋桨敞水试验进行数值模拟。将计算结果绘制成的敞水性能曲线与实验结果进行比较，并对导管螺旋桨的敞水性能进行分析，验证数值模拟计算方法的可行性与准确性。分析螺旋桨敞水工作时的推力、力矩及敞水效率的变化特点发现，随着进速的增大，导管产生的推力不断减小并在高航速下转化为阻力。研究该导管桨在系泊工况下的敞水性能指标，对系泊工况边界条件的设置进行改进。

Research on open-water performance of ducted propeller by numerical calculation

In order to predict the open-water performance of ducted propeller quickly the CFD software was used to simulate the open-water experiment of ducted propeller. According to the results of calculation, the open-water performance curves were drawn and compared with the results of experiment. The open-water performance according to the results was analyzedand it's feasibility and accuracy were verified. The parameters of propeller in open-water is analyzed which including thrusttorque and open-water efficiency. The thrust of the duct decreased with the increase of the propeller’s velocity. And the performance index of the ducted propelled were researched when it worked at mooring conditions, and the method for setting the boundary condition at mooring conditions were studied.