Flow Analysis around a High-speed Planing Hull Model

J. Ocean Eng. Technol. 2009;23(4):38-46.

Kim Byoung-Nam,Kim Wu-Joan,Yoo Jae-Hoon

Research Institute of Medium and Small Ship Building,Department of Naval Architecture & Marine Engineering Mokpo National University,Department of Naval Architecture & Marine Engineering Mokpo National University

고속 활주선 모형 주위의 유동해석

김병남,김우전,유재훈

중소조선연구원,목포대학교 기계조선해양공학부,목포대학교 기계조선해양공학부

Keywords: Planing hull, WAVIS, Fluent, Bow wave, Stern wave

핵심용어: 활주선, 선수파형, 선미파형

Abstract

Two sets of numerical simulations were carried out for a planing hull model ship. In the first, the WAVIS 1.4 linear and nonlinear potential solver was utilized with the free support condition, in which the running posture was determined during calculation. The linear and nonlinear potential calculation results showed qualitative agreement in the trim and resistance coefficient with the MOERI towing tank test. However, the nonlinear potential calculation gave better results than the linear method. In the next simulation, Fluent 6.3.26 with a VOF model and the WAVIS 1.4 nonlinear potential solver were used with the given running posture from the measurement carried out in the MOERI towing tank. Fluent with the VOF method had substantially better agreement with model test results than the results from the WAVIS nonlinear potential calculation for the total resistance coefficient, and for the bow and stern wave patterns, in spite of the much greater computational costs. Both methods can be utilized in planing hull design when their limitations are perceived, and the running posture should be predicted correctly.