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https://doi.org/10.21278/brod73405

INVESTIGATION ABOUT THE HYDRODYNAMIC COUPLING CHARACTERISTICS OF CONTRA-ROTATING AZIMUTH PROPULSOR

Lixun Hou ; Dalian Maritime University, School of Naval Architecture and Ocean Engineering
Qingcai Wang ; Dalian Maritime University, School of Naval Architecture and Ocean Engineering


Puni tekst: engleski pdf 2.414 Kb

verzije

str. 79-105

preuzimanja: 268

citiraj


Sažetak

A numerical study is conducted to determine the hydrodynamic coupling characteristics of a contra-rotating azimuth propulsor (CRAP) in open-water conditions. The detached-eddy simulation (DES) method is utilized to run simulations. A grid verification is conducted and the numerical results are validated based on a puller-type podded propeller. The hydrodynamic forces (i.e., thrusts and torques) are in accordance with the experimental data. The validated numerical method is utilized for subsequent CRAP simulations. The hydrodynamic performance and hydrodynamic coupling characteristics of CRAP are quantitatively analyzed according to forward propeller (FP), rear propeller (RP), and pod unit (PU) indicators with special focus on the hydrodynamic forces and the corresponding unsteadiness. PU appears to have essentially the same effect on the hydrodynamic performance of FP and RP. RP has a weak effect on the hydrodynamic performance of FP, while FP intensely affects that of RP. In general, the CRAP unsteadiness is dominated by RP, especially under heavy loading conditions.

Ključne riječi

CRAP; Detached eddy simulation; Hydrodynamic performance; Unsteadiness; Vortex structure

Hrčak ID:

284762

URI

https://hrcak.srce.hr/284762

Datum izdavanja:

16.9.2022.

Posjeta: 551 *