Abstract
Since the Cold War period, turbine generators have proved to be an important alternative to the development of aerodynamic aircraft designs, and even so, there was little adherence to their use, among which we highlight, short takeoff and landing aircraft (STOL) and some models of military aircraft and commercial jet aircraft. In the USA and Brazil, in addition to other countries, they hold competitions to awaken technological innovation in the aeronautical field for engineering students: the SAE AeroDesign Competition (SAE - Society of Automotive Engineers). These contests allow teams from their countries to use points of difference in their design and, in some cases, to use small unmanned aircraft devices that have already been designed for huge aircraft, such as vortex generators. Therefore, we intend to adopt a Vortex Generator model for the Avoante Aeromec AeroDesign team airplane project (team from the Federal University of Ceara, Brazil - UFC), use Computational Fluid Dynamics (CFD) with turbulence modeling, as well as perform tests in a wind tunnel. Despite the problems found in comparing the results of the computational models with the prototype tests, it was possible to prove the efficiency of these vortex generators in the design of the team's airplane, observing the increase in the stall angle, reduction of the drag coefficient and increase of the coefficient lifting.
Highlights
In aircraft designs, we always take into account how the air behaves when the aircraft is subjected to different conditions
To compare the results found in this study with the results of (MELO et al, 2019), it was used both in the analysis of the Computational Fluid Dynamics (CFD) and test in a wind tunnel whose wing had a wingspan of 400 mm whose rope with the value of the aerodynamic mean chord - or CMac, that is, 382.22 mm, and the control volumes were designed with this chord value using the Mullen (2019) and Cornell University (2015) procedure proposal for flow analysis
With this study and prototype development, it was possible to compare the wings of unmanned airplanes with and without vortex generators, both in CFD and in wind tunnel tests, even with the use of 2D analysis and the nonconsideration of drag from the tip of the wing, it was noted that the goal was achieved with the Vortex generators (VGs)
Summary
We always take into account how the air behaves when the aircraft is subjected to different conditions. In the USA and Brazil, in addition to other countries, they hold competitions to awaken technological innovation in the aeronautical field for engineering students: the SAE AeroDesign Competition (SAE - Society of Automotive Engineers) These contests allow teams from their countries to use points of difference in their design and, in some cases, to use small unmanned aircraft devices that have already been designed for huge aircraft, such as vortex generators. This air that is closest to the wing surfaces is not moving evenly, this is a thin layer to which the fluid's viscosity affects its flow, known as the boundary layer This layer influences the variation of force acting on the lifting surface, especially changing the stall and drag properties. He tried to prevent it from flowing off the surface, because that would greatly change the pressure distribution configuration thought of in the wing design; this new distribution can considerably affect the aircraft's flight and its external structure (GROSS; FASEL, 2018; LAMBERT; RAZAK; DIMITRIADIS, 2017; DURDEN, 2014)
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