CFD Simulation of NACA 2412 airfoil with new cavity shapes

Samuel, Merryisha and Rajendran, Parvathy and Khan, Sher Afghan (2022) CFD Simulation of NACA 2412 airfoil with new cavity shapes. Advances in Aircraft and Spacecraft, 9 (2). pp. 131-148. ISSN 2287-528X E-ISSN 2287-5271

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Abstract

The paper presents the surface-modified NACA 2412 airfoil performance with variable cavity characteristics such as size, shape, and orientation, by numerically investigated with the pre-validation study. The study attempts to improve the airfoil aerodynamic performance at 30 m/s with a variable angle of attack (AOA) ranging from 0° to 20° under Reynolds number (Re) 4.4×105. Through passive surface control techniques, a boundary layer control strategy has been enhanced to improve flow performance. An intense background survey has been carried out over the modifier orientation, shape, and numbers to differentiate the sub-critical and post-critical flow regimes. The wall-bounded flows along with its governing equations are investigated using Reynolds Average Navier Stokes (RANS) solver coupled with one-equational transport Spalart Allmaras model. It was observed that the aerodynamic efficiency of cavity airfoil had been improved by enhancing maximum lift to drag ratio ((l/d) max) with delayed flow separation by keeping the flow attached beyond 0.25C even at a higher angle of attack. Detailed investigation on the cavity distribution pattern reveals that cavity depth and width are essential in degrading the early flow separation characteristics. In this study, overall general performance comparison, all the cavity airfoil models have delayed stalling compared to the original airfoil

Item Type:	Article (Journal)
Additional Information:	7395/97322
Uncontrolled Keywords:	aerodynamic performance; cavity; CFD simulation; flow separation; surface modifier; surface roughness; variable orientation
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering Kulliyyah of Engineering
Depositing User:	Prof. Dr. Sher Afghan Khan
Date Deposited:	23 Mar 2022 15:45
Last Modified:	23 Mar 2022 15:45
URI:	http://irep.iium.edu.my/id/eprint/97322

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