湍流模型对船舶螺旋桨水动力特性的影响及分析

Influence and Analysis of Turbulence Model on Hydrodynamic

为研究不同湍流模型下螺旋桨的水动力特性,选取RNG k-ε、Realizable k-ε以及k-ω SST三种湍流模型,分析三种不同湍流模型下螺旋桨的水动力特性,并将数值计算结果与试验结果相对比。研究结果表明:三种湍流模型均能用来计算螺旋桨的水动力特性,但从计算域的剖面速度矢量图分析可知,RNG湍流模型能够较为清晰地描绘由于螺旋桨运动后尾部水流的流动情况,因此在研究螺旋桨尾流问题时可以优先考虑RNG湍流模型。

To study the hydrodynamic characteristics of propeller under different turbulence models,the RNG k-ε,Realizable k-εand k-ωSST three turbulence models are selected to analyze the hydrodynamic characteristics of propeller under the three different turbulence models,and the numerical results are compared with the experimental results.The research results show that the three turbulence models can be used to calculate the hydrodynamic characteristics of the propeller,but from the analysis of the profile velocity vector diagram in the calculation domain,it can be seen that the RNG turbulence model can clearly describe the water flow behind the propeller due to the propeller moves,so the RNG turbulence model can be given priority when studying the wake of the propeller.