基于CFD法预报组合螺旋桨的水动力特性

Prediction of Hydrodynamic Characteristics of Combined Propeller Based on CFD Method

螺旋桨是船舶的主要推进装置,船舶的推进效率、燃料的消耗和排放量是设计的重要指标。随着计算机性能的提高,有限元法作为计算和评估螺旋桨水动力性能的有效方法,能有效的模拟螺旋桨的运行状况,并获得模拟数据。本文基于CFD数值模拟法对螺旋桨进行有限元计算,比较在不同进度系数下,不同湍流模型对螺旋桨水动力性能的影响;研究螺旋桨的桨叶压力及流场的变化趋势;揭示单桨、对转桨和串列桨的运行特性及敞水性能,为后续研究提供理论基础。

Propeller is the ship's main propulsion system,and ship propulsion efficiency,fuel consumption and emissions have become important index of ship design.With the improvement of computer performance,the finite element method for computing and assessing the propeller hydrodynamic performance can effectively simulate the running status of the propeller and obtain simulated data.In this paper,the finite element calculation of the propeller is carried out based on CFD numerical simulation,and the effects of different turbulence models on the hydrodynamic performance of the propeller are analyzed under different progress coefficients.The variation trend of blade pressure and flow field of propeller is studied,and the operation characteristics and open water performance of single,contra-rotating and tandem propellers are revealed.