Influence of turbulence intensity on aerodynamic characteristics of an NACA 0012 at low Reynolds numbers

Takaaki Tsuchiya, Daiju Numata, Tetsuya Suwa, Keisuke Asai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

The objective of this study is to clarify the influence of turbulence intensity on the aerodynamic characteristics of an NACA 0012 airfoil at Reynolds number in the order of 104. Experiments were conducted by using a low-density testing capability of the Mars Wind Tunnel at Tohoku University. For Reynolds number below 50,000, aerodynamic force and pressure distribution on the model were measured using a force balance and pressure sensitive paint (PSP) for various turbulence intensities. Turbulence intensity in the wind tunnel was changed by using wire-mesh grids having different wire diameters. The results obtained in this study indicated that an increase of turbulence intensity had an effect to improve lift and drag characteristics of the airfoil. With an increasing turbulence intensity, the lift coefficient increased at low angles of attack and near the stall angle. The drag coefficient decreased in all conditions. Also, improvements of the stall angle and the maximum lift coefficient were observed. The characteristics of an NACA 0012 airfoil was dependent both on Reynolds number and turbulence intensity. The overall effects of increasing turbulence intensity were similar to those of increasing Reynolds number.

Original languageEnglish
Title of host publication51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
Publication statusPublished - 2013 Aug 19
Event51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013 - Grapevine, TX, United States
Duration: 2013 Jan 72013 Jan 10

Publication series

Name51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013

Other

Other51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
CountryUnited States
CityGrapevine, TX
Period13/1/713/1/10

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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