An experimental study on the rotational behaviour of a Savonius wind turbine for two-lane highway applications

  • Senthilvel Santhakumar
  • Ilamathi Palanivel
  • Krishnanand Venkatasubramanian
Technical Paper

Abstract

The objective of this work is to understand the behaviour of a Savonius wind turbine (SWT) on two-lane highways located in Coimbatore district, India. Experiments were conducted by placing a Savonius wind turbine (SWT) on the sides of the highway during the south-west monsoon season in three different directional roads, i.e., south-west to north-east, south to north and west to east. Vehicles moving on the highway at varying speeds modify the velocity of air locally, which in turn results in varying the drag forces on the blades of SWT, setting it in motion. An economical SWT was designed, fabricated and tested in a wind tunnel and on the highways, and the angular rotational speeds were measured. Based on the data obtained, further analysis was done to understand the behavioural patterns of SWT. Data obtained from the experiments show a “negative drag force”, which is created in two-way lanes by the vehicles moving in opposite direction, affecting the rotational speed of SWT by a significant proportion. These conditions have been studied and the results have been discussed.

Keywords

Wind behaviour Savonius wind turbine Highway applications Low-rise wind Monsoon 

Abbreviations

D

Diameter of the wind rotor (m)

E

East

N

North

NHAI

National Highways Authority of India

R2

Coefficient of linear regression

S

South

TSR

Tip–speed ratio

T

Torque (Nm)

W

West

NA

Rotational speed of Savonius wind turbine at SW to NE road (RPM)

NB

Rotational speed of Savonius wind turbine at S to N road (RPM)

NC

Rotational speed of Savonius wind turbine at W to E road (RPM)

vA

Wind velocity at SW to NE road (m/s)

vA

Wind velocity at S to N road (m/s)

vA

Wind velocity at W to N road (m/s)

NE

North East

NH

National highways

SW

South-west

a

Swept area (m2)

d

Diameter of the semi-cylindrical wind rotor (m)

p

Power coefficient

r

Radius of the blade (m)

t

Torque coefficient

v

Air velocity (m/s)

ω

Angular velocity of the blade (rad/s)

ρ

Air density (Kg/m3)

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  1. 1.Mechanical Engineering, RVS College of Engineering and TechnologyAffiliated To Anna UniversityCoimbatoreIndia
  2. 2.Production Engineering, Government College of TechnologyAffiliated To Anna UniversityCoimbatoreIndia
  3. 3.Ather EnergyBangaloreIndia

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