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NUMERICAL SIMULATION OF SUBSONIC TURBULENT FLOW OVER NACA0012 AIRFOIL: EVALUATION OF TURBULENCE MODELS

Year 2017, Volume: 35 Issue: 1, 133 - 155, 01.03.2017

Abstract

Subsonic turbulent flow over NACA0012 airfoil at the Reynolds number of 3×106 and different angles of attack (from -12º to 20º) is simulated using OpenFOAM. The flow is assumed ort steady and two-dimensional. Different turbulence models including Spalart-Allmaras, realizable k-ɛ and k-ω Shear Stress Transport (SST) are employed and their accuracy evaluated through the comparison ort h results with the available experimental data. The main focus has been put on the two regions around the airfoil, namely, the transition region and the turbulent region that are of high importance in the evaluation of computational fluid dynamics (CFD) codes. Hence, the laminar to turbulent transition point was determined at various Reynolds numbers in order to get accurate results ort he drag coefficient. It was found that by increasing the angle of attack, the accuracy of all the turbulence models used in the OpenFOAM software would reduce. In addition, the Spalart-Allmaras model showed highest accuracy compared with the other models tested in the present research. In fact, these turbulence models are unable to detect the point where the transition from laminar to turbulent flow occurs and thus have deficiency in determining the accurate flow quantities. Therefore, in both the theoretical and empirical studies the transition effects should be taken into account especially in critical analyses.

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There are 27 citations in total.

Details

Primary Language English
Journal Section Research Articles
Authors

Seyed Mostafa Mousavı This is me

Navvab Shafıeı This is me

Abdolrahman Dadvand This is me

Publication Date March 1, 2017
Submission Date March 2, 2016
Published in Issue Year 2017 Volume: 35 Issue: 1

Cite

Vancouver Mousavı SM, Shafıeı N, Dadvand A. NUMERICAL SIMULATION OF SUBSONIC TURBULENT FLOW OVER NACA0012 AIRFOIL: EVALUATION OF TURBULENCE MODELS. SIGMA. 2017;35(1):133-55.

IMPORTANT NOTE: JOURNAL SUBMISSION LINK https://eds.yildiz.edu.tr/sigma/