Forces, ship motions and velocity wake field for KRISO container ship model in regular head waves

Md Alfaz Hossain, Ping-Chen Wu, Yusuke Shibano, Yasuyuki Toda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Ship motion responses and added resistance in waves have been predicted by a wide variety of computational tools including potential and viscous flow methods. However, to validate the computational flow field is still challenging. In the present work, ship vertical motions, added resistance and detailed wake flow field for a 3.2m KRISO container ship (KCS) model in waves have been predicted by simulation and experiment. The force, motions and S-PIV measurement were conducted in towing tank using same ship model. The viscous flow simulation was performed by CFDSHIP-Iowa with rigid body motion solver and dynamic overset grid. The ship heave and pitch motions were considered in wave and in calm water. The current result shows good agreement between simulation and experiment for the trend of the motion responses and added resistance. As wave length increases, heave and pitch motion amplitudes increase from near zero to almost constant one but the added resistance coefficient raises until the peak at λ/L=1.15. For the nominal wake at propeller plane, the velocity distribution pattern in short waves, e.g. λ/L=0.65, is similar with the calm water one. In long waves such as λ/L=1.15, the bilge vortex moves up and down relative to the stern vertical motions and remains always inside the propeller radius. The secondary vortex is shedding above and below the dummy boss inside the low speed area. The oscillation of nominal wake factor in waves is almost sinusoidal unlike the KVLCC2 one analyzed in our previous study.

Original languageEnglish
Title of host publicationProceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018
PublisherInternational Society of Offshore and Polar Engineers
Pages226-233
Number of pages8
ISBN (Print)9781880653876
Publication statusPublished - 2018 Jan 1
Event28th International Ocean and Polar Engineering Conference, ISOPE 2018 - Sapporo, Japan
Duration: 2018 Jun 102018 Jun 15

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume2018-June
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Other

Other28th International Ocean and Polar Engineering Conference, ISOPE 2018
CountryJapan
CitySapporo
Period18-06-1018-06-15

Fingerprint

Ship models
Containers
Ships
Propellers
Viscous flow
Flow fields
Ship model tanks
Potential flow
Vortex shedding
Flow simulation
Velocity distribution
Water
Vortex flow
Experiments
Wavelength

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

Cite this

Alfaz Hossain, M., Wu, P-C., Shibano, Y., & Toda, Y. (2018). Forces, ship motions and velocity wake field for KRISO container ship model in regular head waves. In Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018 (pp. 226-233). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2018-June). International Society of Offshore and Polar Engineers.
Alfaz Hossain, Md ; Wu, Ping-Chen ; Shibano, Yusuke ; Toda, Yasuyuki. / Forces, ship motions and velocity wake field for KRISO container ship model in regular head waves. Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. International Society of Offshore and Polar Engineers, 2018. pp. 226-233 (Proceedings of the International Offshore and Polar Engineering Conference).
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abstract = "Ship motion responses and added resistance in waves have been predicted by a wide variety of computational tools including potential and viscous flow methods. However, to validate the computational flow field is still challenging. In the present work, ship vertical motions, added resistance and detailed wake flow field for a 3.2m KRISO container ship (KCS) model in waves have been predicted by simulation and experiment. The force, motions and S-PIV measurement were conducted in towing tank using same ship model. The viscous flow simulation was performed by CFDSHIP-Iowa with rigid body motion solver and dynamic overset grid. The ship heave and pitch motions were considered in wave and in calm water. The current result shows good agreement between simulation and experiment for the trend of the motion responses and added resistance. As wave length increases, heave and pitch motion amplitudes increase from near zero to almost constant one but the added resistance coefficient raises until the peak at λ/L=1.15. For the nominal wake at propeller plane, the velocity distribution pattern in short waves, e.g. λ/L=0.65, is similar with the calm water one. In long waves such as λ/L=1.15, the bilge vortex moves up and down relative to the stern vertical motions and remains always inside the propeller radius. The secondary vortex is shedding above and below the dummy boss inside the low speed area. The oscillation of nominal wake factor in waves is almost sinusoidal unlike the KVLCC2 one analyzed in our previous study.",
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Alfaz Hossain, M, Wu, P-C, Shibano, Y & Toda, Y 2018, Forces, ship motions and velocity wake field for KRISO container ship model in regular head waves. in Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. Proceedings of the International Offshore and Polar Engineering Conference, vol. 2018-June, International Society of Offshore and Polar Engineers, pp. 226-233, 28th International Ocean and Polar Engineering Conference, ISOPE 2018, Sapporo, Japan, 18-06-10.

Forces, ship motions and velocity wake field for KRISO container ship model in regular head waves. / Alfaz Hossain, Md; Wu, Ping-Chen; Shibano, Yusuke; Toda, Yasuyuki.

Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. International Society of Offshore and Polar Engineers, 2018. p. 226-233 (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2018-June).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Alfaz Hossain M, Wu P-C, Shibano Y, Toda Y. Forces, ship motions and velocity wake field for KRISO container ship model in regular head waves. In Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. International Society of Offshore and Polar Engineers. 2018. p. 226-233. (Proceedings of the International Offshore and Polar Engineering Conference).