Document Type : Review Article
Authors
1
Master of Mechanical Engineering, Department Marine of Engineering, Chabahar Maritime University, Chabahar, Iran
2
Master Civil Engineering Student, Islamic Azad University- Germi Branch, Germi, Iran
3
Associate Professor, Mechanical Engineering, College of Abouraihan, University of Tehran, Tehran, Iran
Abstract
Converting electricity from wind to electric power by Small Wind Turbines (SWTs) a lot helps to produce electricity. They can be utilized to generate different networks, including independent, connected and integrated networks. Due to the size and installation location, SWTs are suitable for use in low Reynolds numbers (Re). With the aim of developing a marine Vertical Axis Wind Turbine (VAWT) with a porous blade in this research, simulations on different airfoils of NACA 4-digit, series 5-digit, and Selig profiles at different Re values of 60,000, 100,000, and 140,000, using the Double Multiple Stream Tube (DMST) with loss correction. In addition to blade specifications, turbine design parameters such as Aspect Ratio (AR) and solidity (σ) were also investigated by changing blade height and pitch. This paper presents an analysis for the design of a three-bladed VAWT to increase its aerodynamic performance in terms of power performance (Cp). The DMST approach, considering tip loss correction, is an effective lower-order accuracy performance prediction method for analyzing a wide range of turbine designs in a comparative manner with significantly lower computational cost. The study illustrated that the Selig S1046 airfoil to be suitable for wind tunnel tests at target chord Re in the specified Re range. The AR in different Re is more appropriate in the AR of 1.0 in lower and higher Re in a good range of TSR. Besides, the σ of 0.17 is suitable for increasing the turbine performance in the tested range.
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