导管调距桨实效伴流分数的简化CFD计算  

Simplified CFD calculations for the effective wake fraction of ductedcontrollable pitch propellers

作　　者：张弘[1] 刘爱兵[2] 邹义[2] 刘艳[3] 李海涛[1] 

机构地区：[1]大连理工大学船舶工程学院,大连116024 [2]中国船舶重工集团公司第704研究所,上海200031 [3]大连理工大学能源动力学院

出　　处：《传动技术》2015年第4期27-31,36,共6页Drive System Technique

基　　金：国家高技术研究发展计划(863计划)(2009AA045002)

摘　　要：为了获得实效伴流分数和推力减额系数,一般情况下要进行船桨自航实验。在导管调距桨的自航实验中,由于需要测量导管的推力以及调节螺距比,会增加实验的复杂程度。近年来,数值水池的应用得到了广泛关注。但由于计算模型通常为整条船和桨,几何模型复杂且计算量大。针对船体较长且具有平行中体的船舶,本文探索了一种简化模型方法即考虑半个船模和桨,忽略船首对尾部半流的影响。与实验结果比较,满载和压载工况下计算得到的伴流分数误差均约在4%左右。本文的研究表明在缺少实验条件的情况下,简化模型的CFD方法可以作为研究伴流分数的有效手段。Self-propulsion tests of a ship and a propeller are generally required in order to obtain effective wake fractions and thrust reduction coefficients. For ducted controllable-pitch propellers, the complexity of measurement is increased because of the need to measure thrust of the duct and to adjust the pitch ratio. Ap- plication of numerical towing tanks have been attracted attention in recent years. However due to the com- putational domain involving the whole hull and propeller, the geometrical model is complex and the amount of computation is huge. For a long ship with a parallel middle body, a simplified ship model involving only half of the ship and a propeller is explored in this paper. The effect of the ship bow on the wake is ignored. Compared with measurements, an error for computed effective wake fractions is about 4% for both full loading and ballast conditions. This result shows that the current simplified method can be used to predict effective wake coefficients when lacking of experimental facility.

关 键 词：导管调距桨 自航试验 简化模型 CFD伴流分数 

分 类 号：U664.33[交通运输工程—船舶及航道工程]