Numerical Study of Improving the Aerodynamic Performance of the High Lift Devices in the Two-Element Airfoil

علوم کاربردی و محاسباتی در مکانیک

Article 3, Volume 35, Issue 1 - Serial Number 31, March 2023, Pages 37-52   

Document Type: Original Article

DOI: 10.22067/jacsm.2022.79293.1142

Authors

Meysam Izadi¹; Arash shams taleghani^{* 2}; Reza Khaki³

¹PhD candidate, Aerospace Research Institute

²Aerospace Research Institute

³Assoc. Prof. Shahid Sattari Aeronautical University

Abstract

The aim of this research is to improve the aerodynamic performance of a NACA-23012 airfoil equipped with a High lift device by changing its geometric parameters. In this research, Navier-Stokes equations are solved in turbulent and incompressible flow conditions using Fluent software. After the airfoil and flap modeling process, at different flap angles (5 to 30 degrees), unstructured meshing was produced in Gambit software and the improvement of aerodynamic performance due to changes in geometric parameters was investigated. The flow is assumed to be steady, turbulent and incompressible, and the algorithm for solving the equations is also selected as pressure-based. The flow Reynolds range is 3.6*10⁶ and the turbulence model used is realizable k-epsilon. Comparison of the results and aerodynamic characteristics of the airfoil equipped with a flap after making changes in the geometric parameters in the Fluent software, shows that the aerodynamic coefficients are improved significantly (about 15%) and also the flow separation is shifted towards the end of the flap. Also, the investigation of the pressure and velocity gradients at different stages show that the changes are very effective and better distributed compared to the reference article.

Keywords

High Lift Devices; Single Slotted Flaps; Aerodynamic Optimization; Unstructured Grid

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