Added Resistance and 2DOF Motion Analysis of KVLCC2 in Regular Head Waves using Dynamic Overset Scheme

2018 ◽  
Vol 55 (5) ◽  
pp. 385-393 ◽  
Author(s):  
Yoo-Chul Kim ◽  
Yoonsik Kim ◽  
Jin Kim ◽  
Kwang-Soo Kim
Keyword(s):  
Motion Analysis ◽  
Added Resistance ◽  
Head Waves ◽  
Regular Head Waves

scholarly journals Effects of diffraction in regular head waves on added resistance and wake using CFD

2019 ◽  
Vol 11 (2) ◽  
pp. 736-749 ◽  
Author(s):  
Cheol-Min Lee ◽  
Sung-Chul Park ◽  
Jin-Won Yu ◽  
Jung-Eun Choi ◽  
Inwon Lee
Keyword(s):  
Added Resistance ◽  
Head Waves ◽  
Regular Head Waves

scholarly journals Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves

2021 ◽  
Vol 9 (5) ◽  
pp. 504
Author(s):  
Deniz Ozturk ◽  
Cihad Delen ◽  
Simone Mancini ◽  
Mehmet Ozan Serifoglu ◽  
Turgay Hizarci
Keyword(s):  
Full Scale ◽  
Stokes Wave ◽  
Added Resistance ◽  
Motion Responses ◽  
Seakeeping Performance ◽  
Head Waves ◽  
Calm Water ◽  
Maximum Improvement ◽  
Fifth Order ◽  
Regular Head Waves

This study presents the full-scale resistance and seakeeping performance of an awarded Double-M craft designed as a 15 m next-generation Emergency Response and Rescue Vessel (ERRV). For this purpose, the Double-M craft is designed by comprising the benchmark Delft 372 catamaran with an additional center and two side hulls. First, the resistance and seakeeping analyses of Delft 372 catamaran are simulated on the model scale to verify and compare the numerical setup for Fr = 0.7. Second, the seakeeping performance of the full-scale Double-M craft is examined at Fr = 0.7 in regular head waves (λ/L = 1 to 2.5) for added resistance and 2-DOF motion responses. The turbulent flow is simulated by the unsteady RANS method with the Realizable Two-Layer k-ε scheme. The calm water is represented by the flat VOF (Volume of Fluid) wave, while the incident long waves are represented by the fifth-order Stokes wave. The residual resistance of the Double-M craft is improved by 2.45% compared to that of the Delft 372 catamaran. In the case of maximum improvement (at λ/L = 1.50), the relative added resistance of the Double-M craft is 10.34% lower than the Delft 372 catamaran; moreover, the heave and pitch motion responses were 72.5% and 35.5% less, respectively.

Experimental Study on Seakeeping Performance of a Catamaran with Asymmetric Demi-Hulls

2014 ◽  
Vol 66 (2) ◽  
Author(s):  
S. Ikezoe ◽  
N. Hirata ◽  
H. Yasukawa
Keyword(s):  
Experimental Study ◽  
Ship Motion ◽  
Added Resistance ◽  
Scaled Model ◽  
Seakeeping Performance ◽  
Head Waves ◽  
Lateral Space ◽  
Design Speed ◽  
Resistance Performance ◽  
Regular Head Waves

To capture the seakeeping performance of a catamaran with asymmetric demi-hulls, tank tests were carried out in regular head waves using a scaled model with 2.036 m in length. The lateral space between the demi-hulls was changed in the tests as W/B=2.55, 2.90 and 3.25, where W denotes breadth overall and B the breadth of the demi-hull. Also, two models with different water lines of inside flat and outside round (IF-type) and of outside flat and inside round (OF-type) were used. OF-type is superior to IF-type in both ship motion and added resistance performances in waves at the design speed. In IF-type series, the smallest clearance, W/B=2.55 is the best in the added resistance performance.

scholarly journals Numerical study of Iran-Bushehr Container Ship motions and added resistance in regular head waves using STAR-CCM+

2020 ◽  
Vol 16 (31) ◽  
pp. 41-52
Author(s):  
Amirhossein Amiri ◽  
Mohsen Shakeri ◽  
Abas Ramiar ◽  
Mostafa Jafarzadeh Khatibani ◽  
◽  
...  
Keyword(s):  
Numerical Study ◽  
Ship Motions ◽  
Container Ship ◽  
Added Resistance ◽  
Head Waves ◽  
Regular Head Waves

Study of Wave Added Resistance and Motions of KCS in Waves With Different Wave Lengths

2019 ◽  
Author(s):  
Hao Guo ◽  
Decheng Wan
Keyword(s):  
Navier Stokes ◽  
Head Wave ◽  
Ship Motions ◽  
Added Resistance ◽  
Head Waves ◽  
Wide Range ◽  
Stokes Waves ◽  
The Relationship ◽  
Nonlinear Behaviors ◽  
Regular Head Waves

Abstract Estimating added resistance and motions of a ship in waves are essential to predict fuel consumption and speed loss. The added resistance and motions of the 3600 TEU KRISO container ship (KCS) in regular head waves under different wavelengths are investigated using Reynolds-Averaged Navier-Stokes (RANS) method. Volume of Fluid (VOF) method is applied to capture the free surface. The in-house computational fluid dynamics solver, naoe-FOAM-SJTU, is used to compute the added resistance and motions of KCS in regular head waves. Firstly, the first-order Stokes waves in deep water are adopted and generated in naoe-FOAM-SJTU as a numerical wave tank. Secondly, it is presented that the KCS with a Froude number of 0.261 advances in these waves. Regular wave conditions with a wide range of wavelength (0.65 < λ/L < 1.95) are considered. The variations of resistance, pitch and heave show good agreement with experimental results. To investigate nonlinear behaviors of predicted results, Fast Fourier Transform (FFT) is applied to analyze the results of resistance, heave and pitch with in head wave (μ = 180°). KCS with and without motions is also compared to investigate the relationship between components of resistance and wavelengths. The results of added resistances show that the added resistance of KCS is mainly induced by ship diffraction in short waves. The wave diffraction is not affected by wave frequency. In addition, CFD can accurately calculate the problem on added resistance and ship motions.

Sign in / Sign up

Export Citation Format

Share Document