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Numerical flow and performance analysis of waterjet propulsion system

机译：水刀推进系统的数值流与性能分析

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The numerical analysis of a waterjet propulsion system was performed to provide detail understanding of complicated three-dimensional viscous flow phenomena including interactions of intake duct, rotor, stator, and contracted discharge nozzle. The incompressible RANS equations were solved on a moving, non-orthogonal multiblocked grid system. To handle interface boundary between rotor and stator, the sliding multiblock technique using cubic spline and bilinear interpolation method was applied. The numerical results were compared with experiment and a good agreement was obtained. The complicated viscous flow feature of the waterjet, such as the secondary flow inside of the intake duct, the recovery of axial flow by the action of the stator, and tip vortex, etc. were well understood by the present simulation. The performances of thrust and torque were also predicted.
机译：进行了水射流推进系统的数值分析，以提供对复杂的三维粘性流动现象的详细了解，包括入口管道，转子，定子和收缩喷嘴的相互作用。不可压缩的RANS方程是在移动的非正交多块网格系统上求解的。为了处理转子和定子之间的界面边界，应用了三次样条和双线性插值方法的滑动多块技术。将数值结果与实验进行了比较，取得了很好的一致性。通过本模拟可以很好地理解水刀的复杂粘性流动特征，例如进气管道内部的二次流动，通过定子的作用来恢复轴向流动以及尖端涡旋等。还预测了推力和扭矩的性能。

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