Abstract
ABSTRACT: Airfoils generate lift in engineering applications such as for airplanes, wind turbines, automotive spoilers, etc. For accurate CFD analysis of airfoils, the quality of the mesh is of paramount importance, especially when dealing with turbulent flows commonly encountered in real life applications. Currently there are different tools that are available to improve the quality of the mesh required for CFD studies. This paper describes a study to assess the significant of the quality of the mesh on CFD analyses of NACA 23012 airfoil by using selected open source tools. The turbulence is modeled using the well-known k-ω Shear Stress Transport model. For validation, results have been compared with experimental datasets which were obtained from “TAG Stuttgart #1†tunnel.
 ABSTRAK: Sayap pesawat dapat menghasilkan daya angkat dalam aplikasi kejuruteraan seperti kapal terbang, turbin angin, spoiler automotif, dan sebagainya. Kualiti pada jaringan adalah amat penting bagi mendapatkan analisa CFD yang tepat pada sayap pesawat, terutamanya apabila berhadapan situasi aliran turbulen sebenar. Pada masa ini terdapat pelbagai perisian bagi meningkatkan mutu jaringan dalam kajian CFD. Kertas kerja ini membentangkan satu kajian bagi menilai kepentingan kualiti jaringan pada analisis CFD bagi sayap pesawat NACA 23012 dengan menggunakan sumber terpilih perisian terbuka. Model turbulen dibangunkan mengguna pakai model k-ω Shear Stress Transport (SST) yang terkenal. Bagi pengesahan, keputusan uji kaji telah dibandingkan dengan set data yang diperoleh dari terowong "TAG Stuttgart #1â€."
Highlights
Airfoils are widely used for different engineering applications like airplanes, wind turbines, automotive spoilers, etc
Several meshes were investigated at angle of attack, angles of attack (AOA), of 0° and 10o and the best mesh was selected for subsequent detailed analysis at different AOA
The results obtained from OpenFOAM are compared with experimental results adopted from experimental study at Stuttgart Tunnel #1 in reference [12]
Summary
Airfoils are widely used for different engineering applications like airplanes, wind turbines, automotive spoilers, etc. Simulating the aerodynamic performance of airfoils at different angles of attack (AOA) is essential for most engineering applications which rely on the lift (L) to drag (D) ratio. NACA 23012 is interesting for some CFD analyses due to is high aerodynamic performance at low flying velocities. It develops high maximum lift coefficient (CLmax) and high stall angle (αstall). A parametric CFD study of the flow around a NACA airfoil have been conducted and the significance of mesh quality on prediction of lift and drag coefficients have been discussed
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