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Abstract: There are many unresolved issues in Reynolds-averaged Navier-Stokes (RANS) calculations of marine propeller performance, especially in the treatment of complex flow phenomena such as boundary-layer development, scale effects, and tip and hub vortices. The particular focus of this study was to apply three scale-resolving simulation (SRS) methods, i.e. dynamic large eddy simulation (DLES), delayed detached-eddy simulation (DDES), and stress-blended eddy simulation (SBES), to improve the prediction of flow characteristics. Firstly, the effectiveness of the SRS methods was verified by comparing numerical results with experimental data. The external performance of rotating machinery is determined by internal flow structures. Particle image velocimetry (PIV) measurement is established as a visualization tool to analyze the wake evolution of a scaled propeller by velocity and vorticity contours in a specified cross-section plane. We found that SRS methods, especially the SBES model, performed well in predicting characteristic parameters and capturing flow field information via quantitative and qualitative analyses. The ability to accurately predict flow characteristics can make computational tools more effective in meeting the needs of modern propeller design and analysis.

Three scale resolving simulation methods were used in the manuscript to obtain the flow structure near the propeller. The topic is interesting. The manuscript applied three scale-resolving simulation (SRS) methods, i.e., dynamic large eddy simulation (DLES), delayed detached-eddy simulation (DDES) and stress-blended eddy simulation (SBES), to describe the irregular and multi-scale turbulence structures of the propeller flow field. The authors verified the effectiveness of the SRS methods by comparing the numerical results with experimental data. They also used particle image velocimetry (PIV) measurement to analyze the real flow flied of a scaled propeller and found that SRS methods performed well in predicting characteristic parameters and capturing flow field information via quantitative and qualitative analyses, especially the SBES model.

船用螺旋桨流动尺度解析模拟与粒子图像测速验证

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