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Marine propeller optimization using open-source CFD

机译:使用开源CFD的海洋螺旋桨优化

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摘要

Reynolds-Averaged Navier Stokes (RANS) simulations are rapidly emerging and tend to become an integral part of propeller design. Moreover, modern design software like CAESES are available that allow for parametric design and shape optimization by tightly coupling the parametric geometry to computational fluid dynamics (CFD). In the present work, OpenFOAM is selected as the CFD solver and cfMesh as the grid generator. The steady state Moving Reference Frame (MRF) approximation is used to model the rotation and the turbulence is modeled using the k-ω SST model. The CFD methodology is validated on the basis of experimental results for the Potsdam Propeller Test Case (PPTC). Furthermore, a parametric model for the PPTC is created, CFD automation is achieved and the optimized counterpart is derived by modifying the radial distributions that define the blade shape. The optimization is performed using the Sobol sequence and the Tangent Search Method.
机译:Reynolds平均Navier Stokes(RANS)模拟正在迅速涌现,并且倾向于成为螺旋桨设计的一个组成部分。此外,现代设计软件如Caeses,可用于参数化设计和形状优化,通过将参数几何紧密耦合到计算流体动力学(CFD)。在本作工作中,选择OpenFoam作为CFD求解器和CFMESH作为网格发生器。稳态移动参考帧(MRF)近似用于模拟旋转,并且使用K-ωSST模型建模湍流。基于Potsdam螺旋桨测试案例(PPTC)的实验结果验证了CFD方法。此外,创建了PPTC的参数模型,实现了CFD自动化并且通过修改限定刀片形状的径向分布来导出优化的对应物。使用Sobol序列和切线搜索方法执行优化。

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