Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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A Study on the Improvement of Hull-Form Design for Propulsion Type Change of Net Boat Mounted on Tuna Purse Seiner

다랑어 선망어선 탑재용 보조 작업선의 추진기 타입 변화에 의한 선형 개선 연구

  • Lim, Jun-Taek (Graduate School of Mokpo National Maritime University) ;
  • Jang, Ho-Yun (Green-Ship Research Division, Research Institute of Medium and Small Shipbuilding) ;
  • Lee, Kyoung-Woo (Department of Naval Architecture & Ocean Engineering, Mokpo National Maritime University) ;
  • Seo, Kwang-Cheol (Department of Naval Architecture & Ocean Engineering, Mokpo National Maritime University)
  • 임준택 (목포해양대학교 대학원) ;
  • 장호윤 (중소조선연구원 그린선박연구본부) ;
  • 이경우 (목포해양대학교 조선해양공학과) ;
  • 서광철 (목포해양대학교 조선해양공학과)
  • Received : 2018.09.03
  • Accepted : 2018.10.26
  • Published : 2018.10.31
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Abstract

In Korea, tuna purse seine fishery is the industry with the highest production volume in domestic deep-sea fishery. Research has been continuously carried out since the late 1980s, and research on modernization of technology has been actively conducted. However, while auxiliary works boats on the fishing vessels play an important role in the purse seine fishing, related research is not sufficient. In this study, we tried to rebuild the propulsion system of the Net-boat from the propeller to the waterjet type and to perform the hull form conversion to improve the resistance performance of the hull part and improve the motion performance. For this, we calculated the change of the fluid performance of the ship through computational numerical analysis. In addition, towing tank tests were carried out to verify the performance of the existing ship and the ship which changed the propulsion system. As a result, resistance performance of the waterjet type compared to the propeller type was improved by approximately 45 %. It was confirmed that this was due to reduction of the wetted surface area by removing net and improvements in hull form.

우리나라에서 다랑어 선망어업은 국내 원양산업 중 업종별 생산량 1위의 업종으로, 1980년대 중 후반부터 연구가 지속적으로 수행되어왔으며, 기술의 현대화 연구가 활발히 진행되어왔다. 하지만, 어선에 탑재되는 보조작업선들은 원양어업에서 중요한 역할을 맡고 있음에도 관련 연구가 미흡한 실정이다. 이에 본 연구에서는 보조작업선들 중 네트보트의 추진기를 프로펠러에서 워터제트 형태로 변경하고, 그에 따른 선형 변환을 통한 선체 부가저항 감소 및 운항성능을 향상하고자 하였다. 이를 위해 전산수치해석을 통해서 선박의 유체성능 변화를 계산하였으며, 또한 기존 선형 및 추진기 변화 선형에 대해 모형선 수조시험을 수행하여 속도별 저항성능 비교를 수행하였다. 수치해석 및 1/7의 축소모형의 수조시험 결과, 기존의 네트보트 대비 45~58 % 저항성능이 크게 향상되었으며, 이는 철망 제거에 의한 단순 침수표면적 및 선형개선에 의한 저항성능 향상을 확인하였다.

Keywords

References

  1. An, D. H., D. Y. Moon., J. R. Koh., K. D. Cho and D. S. Kim(2003), Effect of El Nino event on the distribution of Korean tuna purse seine fishery in the western central Pacific Ocean, Journal of the Korean Society of Fisheries Technology, Vol. 6, No. 1, pp. 32-40.
  2. Choi, D. I.(2009), A Study of High Efficiency Water jet System for Small Vessel, Thesis for the Degree of Master of Engineering, Kunsan National University Graduate School, pp. 9-20.
  3. Hong, J. K., I. K. Kang and S. J. Jung(2015a), Fishing Performance of Hull Form renovated tuna purse seiner, Journal of the Korean Society of Fisheries Technology, Vol. 51, No. 3, pp. 321-332. https://doi.org/10.3796/KSFT.2015.51.3.321
  4. Hong, J. K., I. K. Kang and S. J. Jung(2015b), Maneuvering character of hull form renovated tuna purse seiner, Journal of the Korean Society of Fisheries Technology, Vol. 51, No. 1, pp. 61-70. https://doi.org/10.3796/KSFT.2015.51.1.061
  5. ITTC(2011), International Towing Tank Conference, 26th ITTC Specialist Committee on CFD in Marine Hydrodynamics, Practical Guidelines for Ship CFD Simulations, Technical report 7.5-03-02-03. Revision 01.
  6. Kihara, K. and T. Ishii(1986), A New Method of Initial Design for High Speed Craft(2), Transition of West Japan Society of Naval Architecture, Vol. 72, pp. 293-300.
  7. Kim, H. S.(1999), Property of fish school and vertical temperature profile of tuna purse seine in the Western Pacific Ocean, Journal of the Korean Society of Fisheries Technology, Vol. 35, No. 3, pp. 237-242.
  8. Kim, I. S., D. W. Park and S. B. Lee(2016), Prediction of fishing boat performance using computational fluid dynamics, Jounal of the Korean Society of Marine Engineering, Vol. 40, No. 4, pp. 574-579. https://doi.org/10.5916/jkosme.2016.40.7.574
  9. Lee, J. S. and C. W. Lee(2014), The Development of Small Water Jet Propulsion for 150HP Grade Inboard Type, Jounal of Korea Society of Marine Engineering, Vol. 38, No. 3, pp. 246-252. https://doi.org/10.5916/jkosme.2014.38.3.246
  10. Lee, M. K., S. I. Lee., Z. K. Kim., J. E. Ku., H. W. Park and S. C. Yoon(2015), The fishing characteristics of Korean tuna purse seine fishery in the Pacific Ocean, Journal of the Korean Society of Fisheries Technology Vol. 51, No. 3, pp. 414-423. https://doi.org/10.3796/KSFT.2015.51.3.414
  11. Ministry of Oceans and Fisheries(2016), Fisheries statistics in fisheries information service. http://www.fips.go.kr Accessed 27 July 2016.
  12. Moon, D. Y., W. S. Yang., S. S. Kim., J. R. Koh and E. J. Kim(2005), Characteristics of the Korean tuna purse seine fishery in the Western and Central Pacific Ocean, Journal of the Korean Society of Fisheries Technology, Vol. 41, No. 4, pp. 263-270. https://doi.org/10.3796/KSFT.2005.41.4.263
  13. Park, C. H., N. H. An, H. Y. Jang and Y. W. Kwon(2012), A Study on the Characteristic of Motion and Resistance Performance from the Body Plan of Planning Leisure Boat at Low Speed, Journal of the Korea Society for Power System Engineering, Vol. 16, No. 4, pp. 17-23. https://doi.org/10.9726/kspse.2012.16.4.017
  14. Park, Y. Y., Y. W. Lee and D. J. Lee(2016), Analysis on fishing conditions of the Korean tuna purse seiner operating in the western and central Pacific Ocean, Journal of the Korean Society of Fisheries Technology, Vol. 52, No. 4, pp. 356-363. https://doi.org/10.3796/KSFT.2016.52.4.356
  15. Rosenfeld, M. and D. Kwak(1991), Time- dependent solutions of viscous incompressible flows in moving coordinates, International Journal for Numerical Methods in Fluids, 13(10), pp. 1311-1328. https://doi.org/10.1002/fld.1650131008
  16. Ryu, K. J., Y. W. Lee and H. S. Kim(2015), A change of rigging method for purse seine gear of Korea tuna purse seine fishery in the Western and Central Pacific Ocean, Journal of the Korean Society of Fisheries Technology, Vol. 51, No. 1, pp. 50-60. https://doi.org/10.3796/KSFT.2015.51.1.050
  17. Yang, H. U., B. N. Kim, J. H. Yoo and W. J. Kim(2010), Wake Comparison between Model and Full Scale Ships Using CFD, Journal of the Society of Naval Architects of Korea, Vol. 47, No. 2, pp. 150-162. https://doi.org/10.3744/SNAK.2010.47.2.150