How Does a Gurney flap enhance the aerodynamics forces?
Journal
AIAA Journal
Journal Volume
48
Journal Issue
11
Pages
2710-2714
Date Issued
2010
Author(s)
Abstract
A study was conducted to solve the unsteady two-dimensional Navier-Stokes equations coupled with a force-element theory, to distinguish the contributions of individual fluid elements to the aerodynamic enhancements produced by a Gurney flap on a NACA 4412 airfoil. It was essential to introduce auxiliary potential solutions to analyze the various contributions to the force on a finite body in a flow. The test flow in the study was taken to be a two-dimensional stationary NACA 4412 airfoil at a zero angle of attack, with a 0.085 Mach number and a Reynolds number of 1.64 × 106 corresponding to different Gurney flap sizes of 0.5 to 7% airfoil chord length. A 0.9 of Courant-Friedrichs-Lewy number was selected to give enough numerical stability to achieve steady-state solutions.
SDGs
Type
journal article