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A B-spline based higher order panel method for analysis of steady flow around marine propellers

Authors
Kim, G.-D.Lee, C.-S.Kerwin, J. E.
Issue Date
10월-2007
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
B-spline; high-order panel method; desingularization; partitioning method
Citation
OCEAN ENGINEERING, v.34, no.14-15, pp 2045 - 2060
Pages
16
Journal Title
OCEAN ENGINEERING
Volume
34
Number
14-15
Start Page
2045
End Page
2060
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1400
DOI
10.1016/j.oceaneng.2007.02.013
ISSN
0029-8018
Abstract
A higher order panel method based on B-spline representation for both the geometry and the solution is developed for the analysis of steady flow around marine propellers. The self-influence functions due to the normal dipole and the source are desingularized through the quadratic transformation, and then shown to be evaluated using conventional numerical quadrature. By selecting a proper order for numerical quadrature, the accuracy of the present method can be increased to the machine limit. The far- and near-field influences are shown to be evaluated based on the same far-field approximation, but the near-field solution requires subdividing the panels into smaller subpanels continuously, which can be effectively implemented due to the B-spline representation of the geometry. A null pressure jump Kutta condition at the trailing edge is found to be effective in stabilizing the solution process and in predicting the correct solution. Numerical experiments indicate that the present method is robust and predicts the pressure distribution on the blade surface, including very close to the tip and trailing edge regions, with far fewer panels than existing low-order panel methods. (c) 2007 Elsevier Ltd. All rights reserved.
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Kim, Gun Do
지능형선박연구본부 (함정공학연구센터)
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