0
research-article

EXAMINING THE AERODYNAMIC DRAG AND LIFT CHARACTERISTICS OF A NEWLY DEVELOPED ELLIPTICAL-BLADED SAVONIUS ROTOR

[+] Author and Article Information
Nur Alom

Trainee Teacher, Department of Mechanical Engineering, National Institute of Technology Meghalaya, Shillong - 793003, India
nuralomme19@gmail.com

Ujjwal K. Saha

Professor, Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati- 781039, India
saha@iitg.ernet.in

1Corresponding author.

ASME doi:10.1115/1.4041735 History: Received April 15, 2018; Revised September 30, 2018

Abstract

The elliptical-bladed Savonius wind turbine rotor has become a subject of interest because of its better energy capturing capability. Hitherto, the basic parameters of this rotor such as overlap ratio, aspect ratio, number of blades, and others have been studied and optimized numerically. Most of these studies estimated the torque and power coefficients (CT and CP) at given flow conditions. However, the two important aerodynamic forces viz., the lift and the drag acting on the elliptical-bladed rotor have not been studied. This calls for a deeper investigation into the effect of these forces on the rotor performance to arrive at a suitable design configuration. In view of this, at the outset, two-dimensional (2D) unsteady simulations are conducted to find the instantaneous lift and drag forces acting on an elliptical-bladed rotor at a Reynolds number (Re) = 0.892x105. The shear stress transport k-? turbulence model is used for solving the unsteady Reynolds Averaged Navier-Stokes equations. The three-dimensional (3D) unsteady simulations are then performed which is then followed by the wind tunnel experiments. The drag and lift coefficients (CD and CL) are analyzed for 0o- 360o rotation of rotor with an increment of 1o. The total pressure, velocity magnitude and turbulence intensity contours are obtained at various angles of rotor rotation. For the elliptical-bladed rotor, the average CD are CL, from 3D simulation, are found to be 1.31 and 0.48, respectively; whereas the wind tunnel experiments demonstrate the CP to be 0.19.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In