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부성윤,Boo Sung Youn 한국군사과학기술학회 2004 한국군사과학기술학회지 Vol.7 No.3
Unmanned surface vehicles(USVs) have been developed for special operations in foreign navies. These will be employed to conduct critical missions including inspection, coast guard, ISR, fire protection, precision strike, mine interception warfare and antisubmarine warfare. It is also known the USVs will be deployed at the front line of the network-centric warfare to replace the manned naval operations. The unmanned operation can, thus, minimize unnecessary risk to personnel and enhance the success probability for the imposed mission. In this research, the USVs which are under operation and development in foreign navies are investigated. Based on this, an USV with $7\~10m$ of length and 10ton of weight for the Korean Navy which can be deployed near the Northern Limit Line(NLL), is proposed.
부성윤(Sung-Youn Boo) 한국해양공학회 1999 韓國海洋工學會誌 Vol.13 No.2
Warm or waste water discharged from offshore-based facilities often causes environmental polution as it is transported to coastal area due to tidal actions. In this research a floating-type current control structure is introduced in order to reduce the pollutant spreading in the coastal area. Effectiveness of the structure is investigated through the numerical experiment which is based on a 3-D finite difference multi-level scheme. The warm-water spreading in the bay is reduced when the draft of the structure increases and its optimum draft is found to be between 0.25h and 0.65h, where h is the water depth. The proposed structure is also tested in the Gohyun Bay and it is proven to be applied to controlling pollutant spreading if its draft is properly chosen.
부성윤(SUNG YOUN BOO) 한국해양공학회 2005 韓國海洋工學會誌 Vol.19 No.1
Tidal circulation in a closed bay using a variation of bottom roughness was investigated through the numerical experiments based on a finite difference multi-level model. Various distributions of bottom roughness in the bay were implemented to determine their effects. It hadbeen determined that residual currents can be generated from the differences of the bottom roughness between streaming and reverse flow directions. The magnitude of residual currents and volume flow rate increase when the relative ratio of bottom roughness between streaming and reverse flow directions increase. Circulation in the closed bay is also improved by the employment of the change of bottom roughness.
Open Boundary Modeling for Fully Nonlinear Wave Simulation in a 3-D Numerical Wave Tank
Sung-Youn Boo(부성윤) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.1
3차원 파수조에서 완전 비선형파를 시뮬레이션하기 위하여 우선 랜킨 소스를 기저로한 적분방적식을 고차경계요소법을 이용하여 이산화하였다. 그리고 방사경계조건은 파홉수 비치와 포텐셜 스트레칭 기법을 이용하여 모델링하였으며, 비선형 자유표면과 경계조건식은 고차 예측 및 보정 기법을 이용하여 시간 적분하였다. 파홉수 비치는 파의 진행방향 특성에 따라 수조내에 다양하게 배치할 수 있으며, 비치에서 흡수가 덜된 파는 수조의 길이 방향 끝단에서 포텔셜 스트레칭 기법에 의하여 반사없이 진행하도록 하였다. 수치실험 결과 일-에너지 보존 법칙과 모멘템-임펄스 보존 법칙이 만족됨으로써 본 수치기법의 효용성이 검증되었다.
Levelized Cost of Energy for a 200 MW Floating Wind Farm with Variance Analysis
Steffen Shelley,Sung Youn Boo(부성윤),William Luyties 한국해양환경·에너지학회 2018 한국해양환경·에너지학회 학술대회논문집 Vol.2018 No.11
The technology to engineer, fabricate and install floating wind exists and is feasible for all components, turbines or foundation. Applying lessons learned from offshore oil and gas projects with respect to engineering execution options, competitive supply and reduction in life cycle costs makes offshore floating wind a commercially viable energy supply in regions with moderate to high electricity prices or in regions that have other geographical or resource constraints to bringing additional energy supply on-line. For this study, a 200 MW floating wind farm located 50 km SE off the coast of Ulsan City is considered. The considered farm consists of 40 units of Y-Wind semi type floating platform with 5 MW turbine. The Levelized Cost of Energy (LCoE) of the farm is calculated according to the U.S. NREL method. The LCoE is also compared against existing electricity prices of Korea to assess project feasibility. The results indicate that a 200MW wind farm with Y-Wind foundations will have an LCoE value of around $0.162 / kWh, as compared to an LCoE value of $0.114 / kWH for the current Korea residential electricity price. Several LCoE factors are then varied to determine the sensitivity of LCoE to those factors and to identify which factors are critical to control and reduce in order to bring the wind farm cost to be competitive against existing electricity prices in Korea. Additional socio-economic benefits are discussed that can justify the LCoE of a floating wind development in markets with low electricity prices, such as in Korea. The successful implementation of offshore floating wind requires developing and implementing business, engineering and execution strategies and plans in a careful manner in order to achieve the benefits of floating offshore wind energy, namely, diversity and security of energy supply, access to large amounts of energy where needed, low carbon technology and of course, lower total energy costs.
LiDAR가 탑재된 계류된 부유식 기상 부이의 개념 설계
김정록(Jeongrok Kim),이혜빈(Hyebin Lee),조일형(Il-Hyoung Cho),경남호(Nam-Ho Kyong),부성윤(Sung-Youn Boo) 한국해양공학회 2017 韓國海洋工學會誌 Vol.31 No.5
This paper reports the conceptual design process for a floating metocean data measurement system (FMDMS) for measuring wind information at sea. The FMDMS consists of three circular pontoons, columns, and a deck, which the LiDAR (lighting detection and ranging) is installed on. The dynamics of the mooring lines and motion responses of the FMDMS were analyzed using commercial codes such as WAMIT and OrcaFlex. One design criterion of the developed FMDMS was to maintain the motion responses as small as possible to enhance the LiDARs accuracy. Starting with the preliminary design parameters such as the FMDMSs principal dimensions, weight, and important parameters of mooring system,we checked whether the FMDMS met the design requirements at each design stage, and then made modifications as necessary. The developed FMDMS showed a large pitch behavior for a small heave motion.