华中科技大学学报（自然科学版）2016，Vol.44Issue(6)：68-71,4.DOI:10.13245/j.hust.160613
导管结构改进后导管桨的水动力性能研究
Research on hydrodynamic performance of ducted propeller after structure improvement of duct
摘要
Abstract
The experimental model of 19A duct was improved.Protrusion structure was fixed on the latter part of the inner duct wall in order to increase the propulsion efficiency of the ducted propeller.The SST k-ωo model was applied to hydrodynamic performance calculations of Ka4 55 propeller with 19A duct,and the thrust coefficient,torque coefficient and open water efficiency of the propulsion system as a function of advance coefficient were obtained.By comparing the experimental and calculated values of the ducted propeller,the reliability of the calculation method was verified.The parameters of the improved duct was optimized and the duct model with a higher propulsion efficiency was obtained.The calculation results indicate that the improved duct can increase the efficiency of the ducted propeller.At the design advance coefficient J=0.5,the efficiency of the ducted propeller is increased by 2.62％.By comparing the pressure distributions and velocity distributions in the duct before and after the improvement,the mechanism of the efficiency increasing is analyzed.关键词
导管桨/水动力性能/计算流体力学/结构改进/参数优选Key words
ducted propeller/hydrodynamic performance/computational fluid dynamics/structure improvement/parameter optimization分类
交通工程引用本文复制引用
孙瑜,苏玉民,刘伟..导管结构改进后导管桨的水动力性能研究[J].华中科技大学学报（自然科学版）,2016,44(6):68-71,4.基金项目
国家自然科学基金资助项目(51479039,51009038) （51479039,51009038）
中国博士后科学基金资助项目(2013M540271) （2013M540271）
中央高校基本科研业务费专项资金资助项目(HEUCFD1403). （HEUCFD1403）
