Title: Numerical investigation of the co-flow jet airfoil on aerodynamic performance

Authors: C.M. Vigneswaran; G.C. Vishnu Kumar

Addresses: Department of Aeronautical Engineering, Hindustan Institute of Technology and Science (HITS), Chennai, Tamil Nadu, India ' Department of Aeronautical Engineering, Hindustan Institute of Technology and Science (HITS), Chennai, Tamil Nadu, India

Abstract: The present project performed the numerical analysis to establish the correlation between the aerodynamic performance of a co-flow jet (CFJ) airfoil and the coefficient of jet momentum (C_μ). The coefficient of jet momentum is a non-dimensional parameter that can be defined and characterised similarly to coefficient of lift (C_L) and coefficient of drag (C_D) and it is significantly correlated with the aerodynamic performance of the CFJ airfoil. The CFJ airfoils are designed and analysed with three distinct coefficient of jet momentum of 0.03, 0.04 and 0.05 by altering the injection slot height, injection mass flow rate, injection jet velocity, while retaining the Mach number, Reynolds number and the location of the slots are constant. To carry out the numerical analysis, the Spalart-Allmaras turbulence model was employed to solve RANS equations for 2D incompressible flow. The CFJ airfoils with similar coefficient of jet momentum having the higher injection velocity are increasing the C_L and stall margin to a larger extent, yet the higher mass flow rate reduce drag to some extent.

Keywords: airfoil; co-flow jet airfoil; co-flow jet; CFJ; jet momentum coefficient; injection jet velocity; aerodynamic performance.

DOI: 10.1504/PCFD.2023.131029

Progress in Computational Fluid Dynamics, An International Journal, 2023 Vol.23 No.3, pp.163 - 169

Received: 11 Mar 2022
Accepted: 06 May 2022
Published online: 19 May 2023 *

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