| Autor: |
Jason Bennett, Michael Mifsud, S. T. Shaw |
| Rok vydání: |
2006 |
| Předmět: |
|
| Zdroj: |
AIAA Atmospheric Flight Mechanics Conference and Exhibit. |
| DOI: |
10.2514/6.2006-6005 |
| Popis: |
In this paper a high-fidelity low cost aerodynamic model is presented for use in parametric studies of weapon aerodynamics. The method employs a reduced-order model obtained from the proper orthogonal decomposition of an ensemble of CFD solutions. A pseudo-continuous representation of the projection coefficients describing the reduced-order model is constructed to provide predictions of parameter combinations not in the original set of observations. The paper explores the performance of a number of strategies for the generation of the initial ensemble of computational experiments including the full factorial design of experiment and the Latin Hyper-Cube sampling method. Interpolation and response surface techniques for pseudo-continuous representation of the projection coefficients are also evaluated. The model has been applied to two flow problems related to high-speed weapon aerodynamics; inviscid flow around a flare stabilized hypersonic projectile and supersonic turbulent flow around a fin stabilized projectile with drooping nose control. Comparisons of model predictions with high-fidelity CFD simulations suggest that the proper orthogonal decomposition provides a reliable and robust approach to the construction of reducedorder models. The practicality of the meta-model is shown to be sensitive to the technique used to generate the ensemble of observations from which the model is constructed while the accuracy of the approach is limited by the pseudo-continuous representation of the projection coefficients. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
