초소수력 발전용 원통형 헬리컬 터빈의 유동해석

다국어 초록 (Multilingual Abstract)

This paper presents the flow analysis of flow over a cylindrical helical-blade turbine to investigate its optimum performance by varying design parameters. For numerical investigations, shear stress transport (SST) turbulence model is used. This simulation is carried out using commercial code CFX by ANSYS Inc. In this paper, the shape optimization was of turbine blades with NACA0021 performed for the vertical-axis turbine having the cylindrical shape. The influences of blade angle of attack, helical angle, and solidity on each shape are grasped. From of the flow analysis, power coefficient decreased when the helical angle was 20 degrees or more, and no electricity is produced when the solidity of 0.1. As a result of the shape optimization, the cylindrical turbine showed the highest power coefficient of 0.2733 at 3° of the blade angle of attack, 10° of the helical angle, and 0.2 of the solidity at the tip speed ratio of 1.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 해석변수 및 터빈형상설계
• 2.1 작동변수
• 2.2 설계변수
• 2.3 터빈형상 설계
• 3. 터빈에 대한 유동해석
• 3.1 해석기법
• 3.2 격자생성 및 경계조건
• 4. 유동해석 결과 및 고찰
• 4.1 받음각(Angle of attack, α)의 영향
• 4.2 비틀림각(Helical angle, ∅)의 영향
• 4.3 솔리디티(Solidity, S)의 영향
• 4.4 최적화 형상
• 5. 결론
• 후기
• References

참고문헌 (Reference)

1 한준선, "파라메트릭 스터디를 통한 조류발전용 다리우스터빈의 설계연구" 한국해양환경·에너지학회 13 (13): 241-248, 2010

2 정현주, "조류발전용 수직축 터빈 주위의 비정상 유동 수치해석" 한국해양환경·에너지학회 12 (12): 9-14, 2009

3 김행곤, "송수관로 초소수력 발전용 헬리컬 터빈의 성능평가" 한국기계기술학회 17 (17): 349-354, 2015

4 김행곤, "덕트가 부착된 유동관형 초소수력 발전용 터빈의 성능평가" 한국기계기술학회 17 (17): 984-989, 2015

5 Alexander M. Gorlov, "The helical turbine: A new idea for low-head hydro" 1995

6 K. B. Gaywala, "Performance Prediction of a Straight-Bladed Darrieus Water Turbine using Multiple Stream Tube Model" 4 (4): 41-45, 2017

7 J. S. Na, "Optimized blade of small vertical axis wind turbine and its vortex structure analysis" 13 (13): 15-20, 2015

8 Carlos M. Xisto, "Geometrical Parameters Influencing the Aerodynamic Efficiency of a Small-Scale Self-Pitch High Solidity VAWT" 2015

9 ANSYS Inc., "ANSYS CFX USER Manual, Version 14.5" 2014