Please use this identifier to cite or link to this item: https://doi.org/10.3390/fluids4020090
Title: Computational Optimization of Adaptive Hybrid Darrieus Turbine: Part 1
Authors: Mohan Kumar, Palanisamy 
Surya, Mohan Ram
Sivalingam, Krishnamoorthi
Lim, Teik-Cheng
Ramakrishna, Seeram 
Wei, He
Issue Date: 17-May-2019
Publisher: MDPI AG
Citation: Mohan Kumar, Palanisamy, Surya, Mohan Ram, Sivalingam, Krishnamoorthi, Lim, Teik-Cheng, Ramakrishna, Seeram, Wei, He (2019-05-17). Computational Optimization of Adaptive Hybrid Darrieus Turbine: Part 1. Fluids 4 (2) : 90-90. ScholarBank@NUS Repository. https://doi.org/10.3390/fluids4020090
Abstract: Darrieus-type Vertical Axis Wind Turbines (VAWT) are promising for small scale decentralized power generation because of their unique advantages such as simple design, insensitive to wind direction, reliability, and ease of maintenance. Despite these positive aspects, poor self-starting capability and low efficiency in weak and unsteady winds deteriorate further development. Adaptive Hybrid Darrieus Turbine (AHDT) was proposed by the author in the past study as a potential solution to enhance low wind speed characteristics. The objective of the current research is to optimize the parameters of AHDT. AHDT integrates a dynamically varying Savonius rotor with a Darrieus rotor. A fully detailed 2D numerical study employing Reynold-Averaged Navier Stokes (RANS) is carried out to investigate the impact of the Darrieus rotor diameter (DR) on the Savonius rotor (DT) with regard to hybrid turbine performance. The power coefficient of the Darrieus rotor is evaluated when the Savonius rotor is in the closed condition (cylinder) of various diameters. The influence of Reynolds number (Re) on the torque coefficient is examined. Power loss of 58.3% and 25% is reported for DR/DT ratio of 1.5 and 2 respectively for AHDT with solidity 0.5 at 9 m/s. The flow interaction between the Savonius rotor in closed configuration reveals the formation of von Karman vortices that interact with Darrieus blades resulting in flow detachment. An optimum diametrical ratio (DR/DT) of 3 is found to yield the maximum power coefficient of the Darrieus rotor.
Source Title: Fluids
URI: https://scholarbank.nus.edu.sg/handle/10635/155478
ISSN: 23115521
DOI: 10.3390/fluids4020090
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Computational _AHDT_Part 1.pdfPublished version15.62 MBAdobe PDF

OPEN

NoneView/Download

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.