EVALUATION OF INTERCEPTOR DESIGN TO REDUCE DRAG ONPLANING HULL

Brodogradnja

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Yulianti, Serliana¹  Kiryanto, Kiryanto¹  Iqbal, Muhammad²  Samuel, S¹  Mursid, Ocid¹ 

[1] Department of Naval Architecture, Universitas Diponegoro;Department of Naval Architecture, Ocean, and Marine Engineering, University of Strathclyde

关键词: planing hull;    drag;    heave;    lift force;    trim;   

DOI  :  10.21278/brod73306

学科分类：工程和技术（综合）

来源: Brodarski Institut

【 摘 要 】

A planing hull is a high-speed craft with relatively complex hydrodynamic characteristics.An increase in speed can induce a significant change in trim angle with an increment in shipdrag. One solution to reduce ship resistance is to use an interceptor. This research aimed toanalyze the hydrodynamics of a planing hull vessel by applying an interceptor. The fundamentalaspects reviewed included the analysis of drag, trim, heave, and lift force. The interceptor wouldbe investigated on the basis of its integrated position at its height. This research also used thecomputational fluid dynamic (CFD) method in calm water conditions. All simulations wereconducted with the same mesh structure, which allowed the performance evaluation of theinterceptor in calculating turbulent air–water flow around the ship. Numerical calculations usedthe Reynolds-averaged Navier–Stokes (RANS) equation with the k–ε turbulence model topredict the turbulent flow. The vertical motion of the ship was modeled using dynamic fluid–body interaction (DFBI) in the fluid domain through an overset mesh technique. The numericalapproach was compared with the experimental test results of Park et al. to ensure the accuracyof the test results. The interceptor was designed at the transition phase, which showed thehighest trim angle followed by high drag. The interceptor would experience negative trim athigh speeds; thus, it was not recommended. The research results indicated that the mosteffective use of the interceptor was at Froude number 0.87 close to the chine position with aheight of 100%. This interceptor could reduce a maximum of 57% drag, 17% heave, 8.48%trim, and 0.12% lift force. The interceptor could increase excessive drag and trim at Froudenumbers over 1.16. The interceptor proved to be remarkably useful in trim control and shipdrag reduction, but selecting the wrong dimensions and positions of the interceptor couldendanger the ship. This simulation was performed on Aragon-2; thus, the interceptorperformance may possibly change if a different hull geometry is used.

【 授权许可】

CC BY