Abstract
Numerical Investigation of Inner Blade Effects on the Conventional Savonius Rotor with External Overlap
Highlights
The rapid energy consumption, population growth, consumption of traditional energy sources, and the environmental issues are pushing most of the world countries to the efficient use of clean and renewable energy sources
From the past few decades, different efficiency enhancement studies on Savonius wind turbines were carried by varying some design parameters such as number of blades and overlap ratio, until yet none research has been carried on the effect of the inner blade with various blade arc angles on the rotor
Numerical investigations are performed on five new configurations of Savonius wind rotor with an inner blade, in order to analyze their effect on the rotor efficiency
Summary
The rapid energy consumption, population growth, consumption of traditional energy sources, and the environmental issues are pushing most of the world countries to the efficient use of clean and renewable energy sources. VAWTs have become more popular in many countries, especially in small-scale systems In spite of their low efficiency, they have several features over the HAWTs such as low noise, less cost, simple in construction, independent wind directions and ease of maintenance whereby the generator is placed on the ground [4]. Darrieus rotor overcomes Savonius rotor with higher efficiency, in the same time, Savonius rotor has many features over the Darrieus rotor such as the ability to self-start, high starting torque, low maintenance costs, and less noise [6, 7]. These features make the Savonius rotor attractive for researchers in order to develop and increase its efficiency.
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