Understanding crashback in marine propellers using an unsteady actuator disk model

Martin Vyšohlíd, Krishnan Mahesh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

An unsteady actuator disk model is constructed in order to understand unsteadiness in crashback operation of a marine propeller as a competition between two flows of opposite direction: reversed flow through the propeller and the ambient flow due to motion of the vessel. The large eddy simulation methodology is applied to predict the flow corresponding to forward and crashback modes of operation using a non-dissipative, robust numerical algorithm developed by Mahesh et al. (2004, J. Comput. Phys., 197: 215-240) for unstructured grids. Flow visualization shows creation and shedding of unsteady ring vortices which are correlated to the fluctuation of the thrust coefficient. Results of the model are compared to the LES of the full propeller geometry as well as to experimental data.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages11133-11140
Number of pages8
ISBN (Print)1563478900, 9781563478901
DOIs
StatePublished - 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: Jan 8 2007Jan 11 2007

Publication series

NameCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Volume16

Other

Other45th AIAA Aerospace Sciences Meeting 2007
Country/TerritoryUnited States
CityReno, NV
Period1/8/071/11/07

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