RANS simulation of open propeller dynamic loads in regular head waves considering coupled oblique-flow and free-surface effect
To offer references for ventilation and load fluctuation of propeller in actual seaway, this paper presents a RANS (Reynolds-Averaged Navier-Stokes equations) investigation on open propeller dynamic loads in regular head waves at variant submergence depths, from the perspective of the coupled oblique-flow and free-surface effect. Discussions are made concerning the dynamic integral loads and single-blade loads (both axial and in-plane), and instantaneous single-blade loads at different azimuthal positions. CFD (Computational Fluid Dynamics) verification and validation are conducted based on an experiment in calm water and regular head waves conducted in a circulating water channel. As conclusions, under fully-submerged condition, single-blade load variations are related solely to the unsteady oblique-flow environment, with shifts of azimuthal positions corresponding to the maximum and minimum thrust and torque due to inflow non-uniformity. Under periodical-emerging condition, high-frequency integral-load fluctuations are identified by both simulation and experiment, resulting from the enhanced propeller-surface interactions due to upward wake inclination; this enhanced propeller-surface interaction also causes serious ventilation, abrupt rises or drops of axial single-blade loads, and destruction and dissipation of propeller vortex system. Furthermore, the self-induction effect on the load distribution non-uniformity is found to be unobvious in regular waves due to the unsteady and non-uniform inflow environment.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
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Supplemental Notes:
- © 2021 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
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Authors:
- Zhang, Wencan
- Ma, Ning
- Gu, Xiechong
- Feng, Peiyuan
- Publication Date: 2021-8-15
Language
- English
Media Info
- Media Type: Web
- Features: Figures; References; Tables;
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Serial:
- Ocean Engineering
- Volume: 234
- Issue Number: 0
- Publisher: Pergamon
- ISSN: 0029-8018
- EISSN: 1873-5258
- Serial URL: http://www.sciencedirect.com/science/journal/00298018
Subject/Index Terms
- TRT Terms: Dynamic loads; Ocean waves; Propellers; Simulation; Surfaces
- Identifier Terms: Reynolds-Averaged Navier-Stokes Equations
- Subject Areas: Marine Transportation; Vehicles and Equipment;
Filing Info
- Accession Number: 01777138
- Record Type: Publication
- Files: TRIS
- Created Date: Jul 23 2021 3:25PM