This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
New Methodology for Wind Tunnel Calibration Using Neural Networks - EGD Approach
Journal Article
2013-01-2285
ISSN: 1946-3855, e-ISSN: 1946-3901
Sector:
Citation:
Ben Mosbah, A., Flores Salinas, M., Botez, R., and Dao, T., "New Methodology for Wind Tunnel Calibration Using Neural Networks - EGD Approach," SAE Int. J. Aerosp. 6(2):761-766, 2013, https://doi.org/10.4271/2013-01-2285.
Language:
English
Abstract:
One of the hardest tasks involving wind tunnel characterization is to determine the air-flow condition inside the test section. The Log-Tchebycheff method and the Equal Area method allow calculation of local velocities from measured differential pressures on rectangular and circular ducts. However, these two standard methods for air flow measurement are limited by the number of accurate pressure readings by the Pitot tube. In this paper, a new approach is presented for wind tunnel calibrations. This approach is based on a limited number of dynamic pressure measurements and a predictive technique using Neural Network (NN). To optimize the NN, the extended great deluge (EGD) algorithm is used. Wind tunnel testing involves a large number of variables such as wind direction, velocity, rate flow, turbulence characteristics, temperature variation and pressure distribution on airfoils. NN has the advantage that multilayer perceptron neural networks can describe a 3D flow area with a small amount of experimental data, fewer numbers of iterations and less computation time per iteration. The Fluent results are used to train and optimize the proposed NN approach. The validation of this new approach is achieved by experimental tests using the wind tunnel Price-Paidoussis of LARCASE laboratory. This wind tunnel has two test chambers; a first chamber with a section equal to 0.3 × 0.6 meter that provides a speed ranging from 0 to 60 m/s and a second chamber test with a section equal to 0.6 × 0.9 meter that provides a speed from 0 to 30 m/s.
Recommended Content
Technical Paper | The Chrysler 3/8-Scale Pilot Wind Tunnel |
Technical Paper | A New Look At Wind Tunnel Flow Quality For Transonic Flows |
Technical Paper | On the Dependence of Spray Angle and Other Spray Parameters on Nozzle Design and Operating Conditions |