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Title |
Structural Safety Evaluation by Analysis of Pressure Variation Characteristics of Small Hydro Power Hydraulic Turbine Blades in Sewage Treatment Plant
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Authors |
박유신(Yoo-Sin Park) ; 김기중(Ki-Jung Kim) ; 윤병돈(Byong-Don Youn) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.6.126 |
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Keywords |
블레이드 타공 ; 전산 유체 동역학 ; 수차 ; 소수력 ; 유속 변화 Blade hole ; CFD ; Hydraulic turbine ; Small hydro power ; Variable flow velocity |
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Abstract |
Numerical analysis using commercial CFD code was carried out to develop the drag force type vertical axis hydraulic turbine for the improvement of the production efficiency of small hydro energy at low flow velocity condition. Blade pressure changes and internal flows were analyzed according to the presence or absence of the hydraulic turbine blade holes at flow velocity of less than 1.0~3.0 m/s. According to the numerical results, the pressure and flow velocity is severly affected by the flow velocity in turbine blade with no holes, while the influence of flow velocity is comparatively decreased in turbine blade with holes. It is also found that the pressure and flow velocity on the blade surface with holes are evenly distributed with no singular location and it is believed that forming a hole in the blade may be helpful in terms of structural safety.
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