The effect of the guide vane number and inclined angle on the performance improvement of a low head propeller turbine
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초록
Providing guide vanes together with turbine runners is a beneficial method for improving the performance of a hydro turbine. In this study, an evaluation focusing on the effects of guide vanes on the operation of a hydro propeller turbine is conducted. A turbine with a low-head type and medium-specific speed, with four constant-thickness blades was numerically investigated in simulations. The two factors of the guide vane analyzed in this study are the number of guide vanes and their inclined angle (with respect to the turbine axial). First, the general performance of the bare turbine is determined, then the turbine runner working with several guide vane con-figurations is numerically tested under various working conditions. The turbine efficiency and power output are considered as two core factors that indicate the influence of the guide vane on the turbine behavior. In this study, the best guide vane configuration is a combination of eight vanes and a 30° angle, resulting in an efficiency improvement of 6.3%, and an output advancement of 4.2%.
Abstract
Providing guide vanes together with turbine runners is a beneficial method for improving the performance of a hydro turbine. In this study, an evaluation focusing on the effects of guide vanes on the operation of a hydro propeller turbine is conducted. A turbine with a low-head type and medium-specific speed, with four constant-thickness blades was numerically investigated in simulations. The two factors of the guide vane analyzed in this study are the number of guide vanes and their inclined angle (with respect to the turbine axial). First, the general performance of the bare turbine is determined, then the turbine runner working with several guide vane con-figurations is numerically tested under various working conditions. The turbine efficiency and power output are considered as two core factors that indicate the influence of the guide vane on the turbine behavior. In this study, the best guide vane configuration is a combination of eight vanes and a 30° angle, resulting in an efficiency improvement of 6.3%, and an output advancement of 4.2%.
참고문헌 (10)
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