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首页> 外文期刊>Ocean engineering >Numerical research on the effect of brackets installation angle on the propeller wake field and propulsion performance in a four-screw ship
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Numerical research on the effect of brackets installation angle on the propeller wake field and propulsion performance in a four-screw ship

机译：Numerical research on the effect of brackets installation angle on the propeller wake field and propulsion performance in a four-screw ship

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摘要

A series of full-scale self-propulsion simulations of a four-screw ship with different bracket installation angles using the Reynolds-averaged Navier-Stokes (RANS) method were conducted. The effects of the bracket instal-lation angle on the propeller wake field and propulsion performance were investigated and studied. The result shows that the nominal wake low-speed region generated by the shedding vortex moved inward with the bracket angle increased. When the bracket angle turns inward 3 degrees, the effect of shedding vortex almost disappeared in the outer propeller disc. The outer propeller shows a significant increase in thrust and torque, and the time-average load difference between inner and outer propeller drops to below 5. The research conducted in this paper fills a gap in the study of full-scale four-screw ship appendages. The design method for determining the bracket installation angle by inflow direction is of practical significance to the design of four-screw ships.

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