This paper is aimed at presenting the computational studies that have been performed at ONERA–The French Aerospace Lab in 2013 in the framework of the 5th AIAA Drag Prediction Workshop. As data concerning the Common Research Model configuration were collected from the NASA Langley Research Center and Ames Research Center wind tunnels, a significant discrepancy appeared between the experimental and computational pitching moment evaluations. Investigations carried out by NASA in 2012 showed that the experimental model and the numerical geometry were slightly different. Indeed, at the design point, the wing twist of the experiments was stronger than the one used for the computations. Therefore, new computational-fluid-dynamics studies using the Common Research Model wing–body configuration with the corrected twist have been completed at ONERA. The common multiblock grids provided by the Drag Prediction Workshop Committee have been adequately modified before being computed with the ONERA elsA Reynolds-averaged Navier–Stokes solver and the ONERA ffd72 software. This paper exhibits the results of the new grid-convergence process and buffet study (cases 1 and 2 of the Fifth Drag Prediction Workshop). The impacts of the wing-twist modification on drag and moment productions are investigated. The grid-convergence study led with the as-tested shape in fully turbulent conditions gives a drag value close to 254 counts, which is four counts higher than the drag produced by the original numerical geometry. Moreover, to further match the wind-tunnel conditions, computations including a laminar zone up to 10% of the wing chord have been performed. These calculations with experimental wing twist and laminar/turbulent transition significantly improve the agreement between the numerical and experimental data.
Fifth Drag Prediction Workshop: ONERA Investigations with Experimental Wing Twist and Laminarity
Journal of Aircraft ; 51 , 4 ; 1311-1322
2014-07-01
Conference paper , Article (Journal)
Electronic Resource
English
Fifth Drag Prediction Workshop: ONERA Investigations with Experimental Wing Twist and Laminarity
Online Contents | 2014
|Fifth Drag Prediction Workshop: ONERA Investigations with Experimental Wing Twist and Laminarity
British Library Conference Proceedings | 2014
|Fifth Drag Prediction Workshop: Computational Fluid Dynamics Studies Carried Out at ONERA
Online Contents | 2014
|Fifth Drag Prediction Workshop: Computational Fluid Dynamics Studies Carried Out at ONERA
British Library Conference Proceedings | 2014
|