Numerical Study on the Effect of Interceptors on the Resistance and
 Wake Field of Twin-Screw Ship

doi:10.16183/j.cnki.jsjtu.2019.08.010

Abstract

Abstract: Numerical calculation of DTMB5415 ship model with three different depth interceptors were carried out based on RANS（Reynolds-averaged Navier-Stokes） method in order to study the influence of interceptors on the ship resistance and wake field. The hydrodynamic performance of the ship with and without interceptor was analyzed in detail. Meanwhile, the variation of stern waveform, the hull pressure and the axial flow field were discussed. The results shown that the installation of interceptor could reduce the resistance of DTMB5415, and the average drag reduction rate could reach 4.19%. The increase of the virtual length of the hull and the improvement of the tail flow field of the transom stern ship reduced the wave making resistance, which was the main reason for the decrease of the total resistance. The existence of interceptor increased the boundary layer thickness at the ship stern and the axial nominal wake, meanwhile, the average wake fraction at the propeller disk increased by 11.9% when Fr=0.35 and d/LPP=0.0015, where Fr is Froude rumber, d is the depth of the spoiler and LPP is the length of the ship.

Key words: interceptor; wake fraction; twin-screw ship; ship resistance

CLC Number:

U 661

SONG Kewei,GUO Chunyu,GONG Jie,LI Ping,WANG Wei. Numerical Study on the Effect of Interceptors on the Resistance and Wake Field of Twin-Screw Ship[J]. Journal of Shanghai Jiaotong University, 2019, 53(8): 957-964.

References

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Numerical Study on the Effect of Interceptors on the Resistance and Wake Field of Twin-Screw Ship

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