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Lookup NU author(s): Professor Pengfei LiuORCiD
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In panel methods, numerical Kutta conditions are applied in order to ensure that pressure differences between the surfaces at the trailing edges of lifting surface elements are close to zero. Previous numerical Kutta conditions for 3-D panel methods have focused on use of the Newton-Raphson iterative procedure. For extreme unsteady motions, such as for oscillating hydrofoils or for a propeller behind a blockage, the Newton-Raphson procedure can have severe convergence difficulties. The Broyden iteration, a modified Newton-Raphson iteration procedure, is applied here to obtain improved convergence behavior. Using the Broyden iteration increases the reliability, robustness and in many cases computing efficiency for unsteady, multi-body interactive flows. This method was tested in a time domain code for an ice class propeller in both open water flow and during interaction with a nearby ice blockage. Predictions showed that the method was effective in these extreme flows.
Author(s): Liu P, Bose N, Colbourne B
Publication type: Article
Publication status: Published
Journal: International Shipbuilding Progress
Year: 2002
Volume: 49
Issue: 4
Pages: 263-273
Print publication date: 01/12/2002
ISSN (print): 0020-868X
ISSN (electronic): 1566-2829
Publisher: IOS Press
URL: https://content.iospress.com/articles/international-shipbuilding-progress/49-dec-2