Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
COMPARISON OF DIFFERENT EXPERIMENTAL DESIGNS, SAMPLE SIZES AND TECHNIQUES APPLIED TO METAMODELING THE INDUCED DRAG COEFFICIENT OF A BOX-WING AIRCRAFT
Submission Author:
Luiz Fernando Tibério Fernandez , SP
Co-Authors:
Luiz Fernando Tibério Fernandez, Guilherme Barufaldi, Adson De Paula, Luiz Carlos Góes
Presenter: Guilherme Barufaldi
doi://10.26678/ABCM.CONEM2018.CON18-1610
Abstract
This paper compares different metamodeling techniques applied to the design process of a box-wing aircraft, and also different space-filling designs and sample sizes. The metamodels were created in order to establish a relationship between different input parameters - such as lift coefficient, aspect ratio, taper ratio and the separation gap between the upper and lower wings - and the resulting induced drag coefficient. For this comparative work, an existing aerodynamic database of a box-wing aircraft, obtained with a low-order aerodynamic code (vortex lattice method) was used, allowing rapid evaluations. The design points were created with space-filling designs such as Sobol, Latin Hypercube and some variations, and the different metamodels were compared using the mean absolute error as metric. By comparing the techniques with CCD, which is a classic method for experiments, it was possible to examine the difference between a "modern" proposal for computational experiments and a classic formulation for experimental techniques. The main objective of this work is to initiate an analysis that correlates experimental designs with metamodeling accuracy, and it is expected that the obtained results will help to build a guide for future works in the development of box-wing aircraft, providing a benchmark for computational experimental techniques in this particular field.
Keywords
Aerodynamics, metamodeling, box-wing, Experimental design, computational experiments
