混合式CRP推进器操舵工况水动力性能数值研究

Numerical research of hydrodynamic performance of hybrid CRP podded propulsor in steering conditions

[目的]为了研究操舵工况对混合式CRP推进器水动力性能的影响,[方法]采用RANS方法结合SST k-ω湍流模型计算NACA0012型敞水舵的升力系数,通过与试验数据的对比,选定数值计算的近壁面网格布置和近壁面处理方式。在此基础上,进一步预报偏转工况下吊舱推进器的水动力性能,通过试验对比,表明误差在较小范围内。以混合式CRP推进器为研究对象,采用该数值方法预报操舵工况下该型推进器的水动力性能并予以分析。[结果]研究发现,该型推进器后桨推力、吊舱横向力和操舵力矩均随偏转角的增大而增大,前桨推力基本不随偏转变化。[结论]表明该型推进器操纵性能优良,具有广阔的工程应用前景。

In order to study the influence of steering conditions to hybrid CRP podded propulsor,the calculation of the NACA0012open-water rudder's lift coefficient was carried out by applying the RANS method combined with the SST k-ωturbulence model,and the near wall mesh arrangement and near wall treatment method applied in numerical calculation were selected through comparisons between the experimental results and the calculation results.The hydrodynamic performance of a podded propulsor was predicted on the basis of the above,and the calculation results showed a good agreement with the experimental results.The object of the research was a hybrid CRP podded propulsor,and its hydrodynamic performance in steering conditions was predicted by applying the numerical method above.Conclusions were drawn on the relationship between hydrodynamic performance parameters and steering angle,i.e.larger magnitudes of the after propeller thrust,pod horizontal force and steering moment will be acquired atlarger steering angles,and the fore propeller thrust is basically as invariant as the pod steering.The internal reasons were also analyzed.Research shows that the propeller has good maneuverability,and will have wide application prospect.