수치시뮬레이션기법을 이용한 거위목 벌브의 저항성능에 관한 연구

• Published in: 大韓造船學會 論文集 Vol. 47; no. 5; pp. 689 - 696
• Main Authors: 유진원(Jin-Won Yu), 이영길(Young-Gill Lee), 정광열(Kwang-Leol Jeong)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2010
• Subjects: 조선공학; Numerical simulation(수치시뮬레이션); Resistance performance(저항성능); Goose neck bulb(거위목 벌브); Bow hull form(선수선형)
• ISSN: 1225-1143; 2287-7355

Bulbous bow is one of the important design factors on the design of fore-body hull form. Using the interference technique of ship waves, the bulbous bow can decrease the wave resistance of ship. Recently, the goose neck bulb is applied mainly for high speed vessels like passenger ships and ferries etc.. Also, the goose neck bulb is applied for relatively high speed merchant vessels like container ships and LNG carriers. However, existing research papers about the goose neck bulb are not enough as reference data for the design of bow hull form. In this study, numerical calculations are carried out to investigate the bow wave characteristics of a high speed ferry with a normal high nose bulb or a goose neck bulb. By comparing the pressure distributions on the hull surface and the wave systems near the bow, the features of wave resistance reduction are discussed. Also, Numerical calculations were carried out for a series of goose neck bulbs to figure out the optimum bulb size. The maximum reduction rate of pressure resistance for the fore-body is achievable up to 8% by adopting the goose neck bulb in the present calculation.