Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/157006
Title: Aerodynamic comparison of slotted and non-slotted diffuser casings for Diffuser Augmented Wind Turbines (DAWT)
Authors: Sridhar, Surya
Mohammad Zuber
Shenoy B., Satish
Kumar, Amit
Ng, Eddie Yin Kwee
Radhakrishnan, Jayakrishnan
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Sridhar, S., Mohammad Zuber, Shenoy B., S., Kumar, A., Ng, E. Y. K. & Radhakrishnan, J. (2022). Aerodynamic comparison of slotted and non-slotted diffuser casings for Diffuser Augmented Wind Turbines (DAWT). Renewable and Sustainable Energy Reviews, 161, 112316-. https://dx.doi.org/10.1016/j.rser.2022.112316
Journal: Renewable and Sustainable Energy Reviews 
Abstract: The ability of Horizontal & Vertical Axis Wind Turbine (HAWT & VAWT) to harness the incoming wind is limited due to several factors such as structural constrains, fatigue problems, geographical and ecological issues, noise pollution, vibrational & acoustic losses. Diffuser Augmented Wind Turbine (DAWT) exploits the concepts of velocity augmentation to maximize power production efficiently when compared to conventional approach. The optimization of the geometric parameters can help the augmentation capability of the diffuser. This study investigates the aerodynamic effect of slits on diffuser casings and the performance of slotted and non-slotted diffuser casings is compared using 3D CFD analysis and validated experimentally. The performance of the studied diffusers is analysed in terms of velocity at the rotor plane, augmentation ratio, and swallowed mass flow rate. At tip speed corresponding to 62 m/s, the performance parameters of slotted DAWTs showed an increase by 27.4% and 46.8% compared to non-slotted DAWTs and open turbines, respectively. It is also observed that the inclusion of slotted and non-slotted diffusers enclosing the rotor resulted in an average augmentation of 2.01 and 1.36 in both power and torque produced, respectively.
URI: https://hdl.handle.net/10356/157006
ISSN: 1364-0321
DOI: 10.1016/j.rser.2022.112316
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2022 Elsevier Ltd. All rights reserved. This paper was published in Renewable and Sustainable Energy Reviews and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20240707
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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