摘要
采用计算流体力学(CFD)方法对某渡船螺旋桨的水动力性能进行数值预报。先用DTMB P5168桨验证数值模型和方法的准确性与可信性,数值计算其推力系数、力矩系数和敞水效率。整个计算域网格划分均采用全六面体形式,分别采用三种湍流模型进行计算。计算结果与实验的比较表明,SST模型和雷诺应力模型有近乎相同的计算精度,但SST模型的计算速度更快;推力系数误差最大5.8%,力矩系数误差最大为1.7%,敞水效率误差最大为4.3%。然后,将此方法运用到渡船螺旋桨,通过对渡船螺旋桨的网格灵敏度、尺度作用以及相关的流场分析,证明该方法能实现对螺旋桨敞水粘性流场的模拟,以及其敞水性能的预报。
The Computational Fluid Dynamics（CFD）method is used in this paper to predict the hydrody？namic performance of a ferry propeller. Firstly,the numerical models and the methods＇ credibility are vali-dated by calculating the thrust coefficient,torque coefficient,and efficiency of DTMB P5168. Specifical？ly,the whole computational region is generated with Hexa-mesh,and three turbulence models are investi-gated respectively. The comparison between computational results and experimental data shows that theprecision for the SST and RSM turbulence models are almost identical,yet the time cost with SST turbu-lence model is lower,and its error in the thrust coefficient,torque coefficient,and efficiency are 5.8%,1.7%,and 4.3%,respectively. For further validation,the proposed numerical method is applied to a ferrypropeller;through the analysis of its grid dependency,scale effects,and the flow field,the method is seento be reliable in estimating the hydrodynamic performance of the ferry propeller in open water.
出处
《中国舰船研究》
2014年第1期52-58,共7页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51009144)。
