Design and Optimisation of a Low Reynolds Number Airfoil for Small Horizontal Axis Wind Turbines

Jayakrishnan Radhakrishnan, Dhruv Suri

Research output: Contribution to journalConference article

Abstract

Horizontal axis wind turbines (HAWTs) are scaled down to incorporate rotor blades that usually have a diameter ranging from two to four meters in length. A common misconception with regard to selection of airfoils followed by subsequent designing of rotor blades involves the use of NACA airfoils and other conventional high Reynolds number airfoils. Micro horizontal axis wind turbines usually operate at low Reynolds number conditions along the blade length. Conventional aerodynamic schemes cannot be applied to rotor blades operating under low Reynolds number conditions as compared to those occurring under high Reynolds number conditions since certain unusual aerodynamic phenomena predominate in the case of the former. The efficiency of a wind turbine is largely dependent on blade optimization, which is why airfoil selection of the rotor blade is of considerable importance. The difference between high and low Reynolds number operation is the onset of boundary layer transition. In the case of high Reynolds number operation, as is the case of aircraft propellers and other high speed turbines, boundary layer transition takes place before laminar separation, which is in direct contrast to low Reynolds number boundary layer phenomena, wherein laminar separation takes place before boundary layer transition.

Original languageEnglish
Article number012053
JournalIOP Conference Series: Materials Science and Engineering
Volume377
Issue number1
DOIs
Publication statusPublished - 13-07-2018
Externally publishedYes
Event1st International Conference on Mechanical, Materials and Renewable Energy, ICMMRE 2017 - Majitar, East Sikkim, India
Duration: 08-12-201710-12-2017

Fingerprint

Airfoils
Wind turbines
Reynolds number
Turbomachine blades
Boundary layers
Rotors
Aerodynamics
Aircraft propellers
Turbines

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

@article{2ab1d5bb92614b90a5729d28043456c0,
title = "Design and Optimisation of a Low Reynolds Number Airfoil for Small Horizontal Axis Wind Turbines",
abstract = "Horizontal axis wind turbines (HAWTs) are scaled down to incorporate rotor blades that usually have a diameter ranging from two to four meters in length. A common misconception with regard to selection of airfoils followed by subsequent designing of rotor blades involves the use of NACA airfoils and other conventional high Reynolds number airfoils. Micro horizontal axis wind turbines usually operate at low Reynolds number conditions along the blade length. Conventional aerodynamic schemes cannot be applied to rotor blades operating under low Reynolds number conditions as compared to those occurring under high Reynolds number conditions since certain unusual aerodynamic phenomena predominate in the case of the former. The efficiency of a wind turbine is largely dependent on blade optimization, which is why airfoil selection of the rotor blade is of considerable importance. The difference between high and low Reynolds number operation is the onset of boundary layer transition. In the case of high Reynolds number operation, as is the case of aircraft propellers and other high speed turbines, boundary layer transition takes place before laminar separation, which is in direct contrast to low Reynolds number boundary layer phenomena, wherein laminar separation takes place before boundary layer transition.",
author = "Jayakrishnan Radhakrishnan and Dhruv Suri",
year = "2018",
month = "7",
day = "13",
doi = "10.1088/1757-899X/377/1/012053",
language = "English",
volume = "377",
journal = "IOP Conference Series: Materials Science and Engineering",
issn = "1757-8981",
publisher = "IOP Publishing Ltd.",
number = "1",

}

Design and Optimisation of a Low Reynolds Number Airfoil for Small Horizontal Axis Wind Turbines. / Radhakrishnan, Jayakrishnan; Suri, Dhruv.

In: IOP Conference Series: Materials Science and Engineering, Vol. 377, No. 1, 012053, 13.07.2018.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Design and Optimisation of a Low Reynolds Number Airfoil for Small Horizontal Axis Wind Turbines

AU - Radhakrishnan, Jayakrishnan

AU - Suri, Dhruv

PY - 2018/7/13

Y1 - 2018/7/13

N2 - Horizontal axis wind turbines (HAWTs) are scaled down to incorporate rotor blades that usually have a diameter ranging from two to four meters in length. A common misconception with regard to selection of airfoils followed by subsequent designing of rotor blades involves the use of NACA airfoils and other conventional high Reynolds number airfoils. Micro horizontal axis wind turbines usually operate at low Reynolds number conditions along the blade length. Conventional aerodynamic schemes cannot be applied to rotor blades operating under low Reynolds number conditions as compared to those occurring under high Reynolds number conditions since certain unusual aerodynamic phenomena predominate in the case of the former. The efficiency of a wind turbine is largely dependent on blade optimization, which is why airfoil selection of the rotor blade is of considerable importance. The difference between high and low Reynolds number operation is the onset of boundary layer transition. In the case of high Reynolds number operation, as is the case of aircraft propellers and other high speed turbines, boundary layer transition takes place before laminar separation, which is in direct contrast to low Reynolds number boundary layer phenomena, wherein laminar separation takes place before boundary layer transition.

AB - Horizontal axis wind turbines (HAWTs) are scaled down to incorporate rotor blades that usually have a diameter ranging from two to four meters in length. A common misconception with regard to selection of airfoils followed by subsequent designing of rotor blades involves the use of NACA airfoils and other conventional high Reynolds number airfoils. Micro horizontal axis wind turbines usually operate at low Reynolds number conditions along the blade length. Conventional aerodynamic schemes cannot be applied to rotor blades operating under low Reynolds number conditions as compared to those occurring under high Reynolds number conditions since certain unusual aerodynamic phenomena predominate in the case of the former. The efficiency of a wind turbine is largely dependent on blade optimization, which is why airfoil selection of the rotor blade is of considerable importance. The difference between high and low Reynolds number operation is the onset of boundary layer transition. In the case of high Reynolds number operation, as is the case of aircraft propellers and other high speed turbines, boundary layer transition takes place before laminar separation, which is in direct contrast to low Reynolds number boundary layer phenomena, wherein laminar separation takes place before boundary layer transition.

UR - http://www.scopus.com/inward/record.url?scp=85050482769&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85050482769&partnerID=8YFLogxK

U2 - 10.1088/1757-899X/377/1/012053

DO - 10.1088/1757-899X/377/1/012053

M3 - Conference article

VL - 377

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

SN - 1757-8981

IS - 1

M1 - 012053

ER -