• 제목/요약/키워드: 수직축풍력발전기

검색결과 46건 처리시간 0.03초

LES 난류모델을 이용한 4엽형 수직축 풍력발전기 공력해석 및 실험 (AERODYNAMIC ANALYSIS AND EXPERIMENTAL TEST FOR 4-BLADED VERTICAL AXIS WIND-TURBINE USING LARGE-EDDY SIMULATION (LES) TURBULENCE MODEL)

  • 류경중;김동현;추헌호;심재박
    • 한국전산유체공학회지
    • /
    • 제17권3호
    • /
    • pp.11-17
    • /
    • 2012
  • In this study, aerodynamic analyses have been conducted for 4-Bladed Vertical-Axis Wind Turbine (VAWT) configuration and the results are compared with experimental data. Reynolds-averaged Navier-Stokes equation with LES turbulence model is solved for unsteady flow problems. In addition, the computation results by standard k-${\omega}$ and SST k-${\omega}$ turbulence models are also presented and compared. An experiment model of 4-Bladed VAWT model has been designed and constructed herein. Experimental tests for aerodynamic performance of the present VAWT model are practically conducted using the vehicle mounted testing system. Comparison results between the experiment and the computational fluid dynamics (CFD) analyses are presented in order to show the accuracy of CFD analyses using the different turbulent models.

디지털 풍동을 활용한 풍력 발전기 날개 단면 형상 개발에 관한 연구 (A Study on the Development for the Airfoil of Wind Turbine Blade using Digital Wind Tunnel)

  • 강덕훈;우영진;이장호
    • 한국유체기계학회 논문집
    • /
    • 제15권5호
    • /
    • pp.42-47
    • /
    • 2012
  • Newly updated wing shape to apply small vertical wind turbine is tested with digital wind tunnel in this study. Digital wind tunnel is designed to reduce length of wind tunnel and also to maximize its area of test section. Same DC fans of ninety six are installed in the end side of its rectangular duct and air can be blown out to the other side to have uniform flow with same electricity power. New wing is concluded using experimental plan and analysis with 4-parameters and 3-levels, and tested with digital wind tunnel. It shows better performance in lift to drag ratio, and can applied to the wind turbine for the higher torque and lower thrust.

수평 병렬형 풍력 발전기의 요각 및 MPPT 제어 (MPPT and Yawing Control of a New Horizontal-Axis Wind Turbine with Two Parallel-Connected Generators)

  • 이국선;최익;조황;백주훈
    • 한국전자통신학회논문지
    • /
    • 제7권1호
    • /
    • pp.81-89
    • /
    • 2012
  • 범용적으로 사용되고 있는 수평형 풍력 터빈(HAWT)은 블레이드가 장착된 터빈이 회전부인 너셀에 고정되어 타워의 최상단에 지지되는 구조이다. 터빈에서 생산되는 전력은 너셀 내부에서 증속기를 통하여 발전기로 들어가게 된다. 발전기에서 생산되는 전력은 타워를 통해서 지상과 송전선으로 연결되므로 너셀의 요잉이 발생하는 경우 송전선의 꼬임이 발생하게 된다. 따라서 이를 방지하기 위한 슬립링이나 추가적인 요잉 제어 알고리즘이 필요한 단점이 있다. 제안하는 새로운 구조의 HAWT는 베벨기어와 중공축을 이용하여 송전선 문제를 해결하였다. 또한, 병렬로 접속된 두개의 발전기를 이용하여 요잉이 용이할 뿐 아니라 생산 전력을 분산시킴으로써 인버터의 용량을 줄일 수 있다. MPPT 알고리즘과 요잉 제어를 수행하는 시뮬레이션을 통해서 제안하는 구조가 풍력 발전에 효과적임을 보였다.

탄성 플랩을 갖는 2차원 날개 단면 공력 특성 전산해석 (Numerical Analysis of Aerodynamics Characteristics of Two-Dimensional Blade Section with Elastic Flap)

  • 배기성;원창희;이승수
    • EDISON SW 활용 경진대회 논문집
    • /
    • 제3회(2014년)
    • /
    • pp.637-642
    • /
    • 2014
  • 선행 연구에서 블레이드 뒷전에 탄성 플랩이 장착되면 받음각에 따라 양력의 증가가 항력의 증가보다 상대적으로 더 커지게 되어 전체적인 양항비(앙력과 항력의 비)가 증가하는 것을 확인하였다. 본 논문에서는 선행의 연구를 참조하여 플랩의 길이가 변함에 따라서 양력과 항력의 변화를 비교하였다. 블레이드의 종류와 플랩의 제원은 현재 이용되는 수직축 풍력 발전기의 제품과 동일하게 사용하였다. EDISON_CFD와 MIDAS_IT를 이용하여 플랩이 장착된 블레이드 주변의 유체 유동을 해석하고, 플랩의 상하변위를 계산하였다. 이 과정을 반복 수행하여 플랩의 거동을 분석하고 플랩의 길이와 받음각에 따른 양항비를 비교하여 이전보다 효율적인 플랩을 설계하였다.

  • PDF

타워강성 효과를 고려한 소형 수직축 풍력발전기 운전 진동실험 및 해석 (Operational Vibration Experiment and Analysis of a Small Vertical-Axis Wind Turbine Considering the Effect of a Tower Stiffness)

  • 추헌호;심재박;오민우;김동현
    • 한국유체기계학회 논문집
    • /
    • 제16권3호
    • /
    • pp.5-9
    • /
    • 2013
  • In this study, operational vibration experiment and analysis have been conducted for the 4-blade small vertical-axis wind turbine (VAWT) including the effect of tower elastic behavior. Computational structural dynamics analysis method is applied to obtain Campbell diagram for the VAWT with elastic tower. An open type wind-tunnel is used to change and keep the wind velocity during the ground test. Equivalent elastic tower is used to support the VAWT so that the effect of elastic stiffness of the tower can be considered in the present vibration experiment. Various excitation conditions with wind loads are considered and the dominant operating vibration phenomena are physically investigated in detail.

소형 수직축 풍력발전기의 내진검증 해석 (Seismic Qualification Analysis of a Vertical-Axis Wind Turbine)

  • 최영휴;홍민기
    • 한국기계가공학회지
    • /
    • 제15권3호
    • /
    • pp.21-27
    • /
    • 2016
  • The static and dynamic structural integrity qualification was performed through the seismic analysis of a small-size Savonius-type vertical wind turbine at dead weight plus wind load and seismic loads. The ANSYS finite element program was used to develop the FEM model of the wind turbine and to accomplish static, modal, and dynamic frequency response analyses. The stress of the wind turbine structure for each wind load and dead weight was calculated and combined by taking the square root of the sum of the squares (SRSS) to obtain static stresses. Seismic response spectrum analysis was also carried out in the horizontal (X and Y) and vertical (Z) directions to determine the response stress distribution for the required response spectrum (RRS) at safe-shutdown earthquake with a 5% damping (SSE-5%) condition. The stress resulting from the seismic analysis in each of the three directions was combined with the SRSS to yield dynamic stresses. These static and dynamic stresses were summed by using the same SRSS. Finally, this total stress was compared with the allowable stress design, which was calculated based on the requirements of the KBC 2009, KS C IEC 61400-1, and KS C IEC 61400-2 codes.

6kW급 수직축 풍력발전기 형상 및 구조설계 (Aerodynamic and Structural Design of 6kW Class Vertical-Axis Wind Turbine)

  • 김동현;최현철;이종욱;류경중;김성복;김광원;남효우;이명구
    • 한국유체기계학회 논문집
    • /
    • 제14권2호
    • /
    • pp.52-58
    • /
    • 2011
  • In this study, the design and verification of 6 kW class lift-type vertical-axis wind turbine (VAWT) has been conducted using advanced CAE technique based on computational fluid dynamics (CFD), finite element method (FEM), and computational structural dynamics (CSD). Designed aerodynamic performance of the VAWT model is tested using unsteady CFD method. Designed structural safety is also tested through the evaluation of maximum induced stress level and resonance characteristics using FEM and CSD methods. It is importantly shown that the effect of master eccentricity due to rotational inertia needs to be carefully considered to additionally investigate dynamic stress and deformation level of the designed VAWT system.

타워를 포함한 6kW급 수직축 풍력발전기 구조진동해석 (Structure Dynamic Analysis of 6kW Class Vertical-Axis Wind Turbine with Tower)

  • 김동현;류경중;김요한;김성복;김광원;남효우;이명구
    • 한국소음진동공학회:학술대회논문집
    • /
    • 한국소음진동공학회 2011년도 춘계학술대회 논문집
    • /
    • pp.663-670
    • /
    • 2011
  • In this study, the design and verification of 6kW class lift-type vertical-axis wind turbine (VAWT) has been conducted using advanced CAE technique based on computational fluid dynamics (CFD), finite element method (FEM), and computational structural dynamics (CSD). Designed aerodynamic performance of the VAWT model is tested using unsteady CFD method. Designed structural safety is also tested through the evaluation of maximum induced stress level and resonance characteristics using FEM and CSD methods. It is importantly shown that the effect of master eccentricity due to rotational inertia needs to be carefully considered to additionally investigate dynamic stress and deformation level of the designed VAWT system.

  • PDF