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.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2021.108741
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0029801821001761
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • © 2021 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• 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;
• 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