Numerical and Testing Analysis of Fin Stabilizers of A Medium Sized Cruise Ship with Overset Grids

doi:10.16183/j.cnki.jsjtu.2023.S1.04

Abstract

Abstract:

Fin stabilizers represent an effective solution to address the roll motion of ships and improve the comfort of passengers on cruise ships. These devices typically comprise of one or two pairs of retractable fins, symmetrically mounted on either side of the ship, which utilize hydrodynamic lift to dampen motion through a control algorithm. However, coupling analysis of fin stabilizers and ships at various speeds and angles of attack remains limited, particularly with regard to the impact of the hull flow field on fin resistance. This paper investigates the drag performance and towing motion of a cruise ship using model tests and numerical analysis methods, and compares the results of the numerical and model tests. It also examines the drag resulting from fin stabilizers and the coupling motion of the ship, offering insight for the design and selection of fin stabilizers, cruise ship design, and performance prediction.

Key words: fin stabilizer, model test, resistance, cruise ship, different fin angles, different ship speed

CLC Number:

U661

YAO Rulin, FAN Qidong, YU Long, WANG Xuefeng. Numerical and Testing Analysis of Fin Stabilizers of A Medium Sized Cruise Ship with Overset Grids[J]. Journal of Shanghai Jiao Tong University, 2023, 57(S1): 178-184.

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参数	数值
垂线间长,L_PP/m	3.725
型宽,B/m	0.564
吃水,T/m	0.117
排水量,Δ/t	0.174
湿表面积,S_w/m²	2.362
重心,L_CG/m	1.611
重心,K_G/m	0.287
鳍切片翼型	NACA0021
鳍弦长,C/m	0.06
长宽比	2.05
鳍长,L_F/m	0.124

工况编号	航速/ kn	弗劳德数 (Fr)	模型速度/ (m·s^-1)	鳍攻角/(°)
工况编号	航速/ kn	弗劳德数 (Fr)	模型速度/ (m·s^-1)	0	20
1	5	0.057	0.3468	①	⑤
2	14	0.159	0.9711	②	⑥
3	18	0.204	1.2485	③	⑦
4	22	0.249	1.5260	④	⑧

	减摇鳍攻角/(°)	阻力/N
模型试验	0	7.775
模型试验	20	9.965
DFBI模拟	0	7.926
DFBI模拟	20	10.11
重叠网格模拟	0	7.789
重叠网格模拟	20	10.066

Fr	Re	减摇鳍阻力/N
Fr	Re	试验获得值	CFD计算值	不考虑船体计算值
0.159	1.19×10⁵	1.834	1.749	2.598
0.204	1.53×10⁵	2.7596	2.7617	3.946
0.249	1.87×10⁵	4.0437	4.0648	6.098

类型	升沉/cm	横摇/(°)	减摇鳍攻角/(°)
模型试验	-0.2574	-0.0167	0
重叠网格	-0.2835	-0.0170	0