Publication Detail

A Panel Method for the Analysis of the Flow Around Highly Skewed Propellers

13 pp.
MITSG 92-05J

A potential-based low-order panel method, which discretizes the propeller surface with planar quadrilateral panels, has been applied to analyze the flow around a propeller with extreme geometries. The results are much less satisfactory than for conventional geometries. Hyperboloidal panels improve the performance of the method substantially. A grid oriented along constant radii generates panels with high aspect ratio and high skewness near the propeller tip, which results in inaccurate calculations of velocities. A 'blade orthogonal grid' is developed to solve this problem. A linear relationship exists between thickness and circulation distribution for hydrofoils and propellers. A consistency test is imposed by applying this linear relationship to compare the results of the panel method and a lifting surface method. Finally, the improved propeller panel method is tested for convergence, and compared to other methods.

type: Technical reports

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