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2020 Vol.42, Issue 4 Preview Page

Article

Study on Load Reduction of a Tidal Steam Turbine Using a Flapped Blade

플랩 블레이드를 이용한 조류 터빈의 부하 저감에 대한 연구

Dasom Jeong1
,
Jin Hwan Ko1†
정 다솜1
,
고 진환1†
1Major of Mechanical Engineering, College of Engineering, Jeju National University, Jeju 63243, Korea
1제주대학교 공과대학 기계공학전공, (63243) 제주특별자치도 제주시 제주대학로 102
*jko@jejunu.ac.kr
30 December 2020. pp. 293-301
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Abstract

Blades of tidal stream turbines have to sustain many different loads during operation in the underwater environment, so securing their structural safety is a key issue. In this study, we focused on periodic loads due to wave orbital motion and propose a load reduction method with a blade design. The flap of an airplane wing is a well-known structure designed to increase lift, and it can also change the load distribution on the wing through deflection. For this reason, we adopted a passive flap structure for the load reduction and investigated its effectiveness by an analytical method based on the blade element moment theory. Flap torsional stiffness required for the design of the passive flap can be obtained by calculating the flap moment based on the analytic method. Comparison between a flapped and a fixed blade showed the effect of the flap on load reduction in a high amplitude wave condition.

Keywords
blade element momentum theory
load reduction
passive flap
tidal stream turbine
wave- induced velocity
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Information
  • Publisher :Korea Institute of Ocean Science and Technology
  • Publisher(Ko) :한국해양과학기술원
  • Journal Title :Ocean and Polar Research
  • Journal Title(Ko) :Ocean and Polar Research
  • Volume : 42
  • No :4
  • Pages :293-301
  • Received Date : 2020-07-13
  • Revised Date : 2020-09-15
  • Accepted Date : 2020-09-25
  • DOI :https://doi.org/10.4217/OPR.2020.42.4.293
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