Far-Field Drag Prediction and Decomposition Method for Unsteady Flows

2011 ◽  
Author(s):  
Martin Gariepy ◽  
Jean-yves Trepanier ◽  
Benoit Malonin ◽  
Christian Masson
Keyword(s):  
Decomposition Method ◽  
Unsteady Flows ◽  
Far Field ◽  
Drag Prediction

Convergence Criterion for a Far-Field Drag Prediction and Decomposition Method

AIAA Journal ◽  
2011 ◽  
Vol 49 (12) ◽  
pp. 2814-2818 ◽  
Author(s):  
Martin Gariépy ◽  
Jean-Yves Trépanier ◽  
Christian Masson
Keyword(s):  
Decomposition Method ◽  
Convergence Criterion ◽  
Far Field ◽  
Drag Prediction

scholarly journals Aerodynamic Design and Shape Optimization with the Far-Field Drag Decomposition Approach

2020 ◽  
Vol 38 (3) ◽  
pp. 558-570
Author(s):  
Li Li ◽  
Junqiang Bai ◽  
Xiaolong He
Keyword(s):  
Shape Optimization ◽  
Axial Velocity ◽  
Decomposition Method ◽  
Far Field ◽  
Aerodynamic Shape Optimization ◽  
Decomposition Approach ◽  
Total Drag ◽  
Velocity Defect ◽  
Aerodynamic Shape ◽  
Drag Prediction

In the aerodynamic shape design, the drag prediction has always been an extremely challenging mission for the exploration of a configuration. As for the more complex configurations, it is especially desired to the availability of a highly accurate and reliable aerodynamic numerical solution. For improving the drag prediction accuracy and promoting the aerodynamic shape designs, firstly, the characteristics of drag prediction based on far-field drag method and near-field drag method is analyzed and compared. Also, the merits and demerits of defining axial velocity defect with the current main far-field drag prediction approaches is summarized, which promotes the building of the improved method of axial velocity defect and the improved far-field drag prediction and decomposition approach. Moreover, during the establishment of the drag decomposition method, it is necessary to judge and decide on the selection of the drag region. Therefore, the discussions on the sensitivity of the relevant parameters are fulfilled. Furthermore, based on the far-field drag prediction and decomposition method constructed, the aerodynamic performance research of Common Research Model wing-body configuration is launched. The results show that it can effectively observe and analyze the changes in drag components, their impact on the total drag and the contribution percentage. Finally, combining the far-field drag prediction and decomposition method proposed in this paper with a gradient-based aerodynamic shape optimization design system, the aerodynamic shape optimization designs are studied with CRM wing-body configuration. The results can not only directly analyze the detailed change of the visualized drag region, but also can obtain the more accurate total drag and lift-to-drag ratio of the optimized configuration by removing the spurious drag.

Generalization of the Far-Field Drag Decomposition Method to Unsteady Flows

AIAA Journal ◽  
2013 ◽  
Vol 51 (6) ◽  
pp. 1309-1319 ◽  
Author(s):  
Martin Gariepy ◽  
Jean-Yves Trepanier ◽  
Benoit Malouin
Keyword(s):  
Decomposition Method ◽  
Unsteady Flows ◽  
Far Field

Far-Field Induced Drag Prediction Using Vorticity Confinement Technique

2014 ◽  
Vol 51 (6) ◽  
pp. 1953-1958 ◽  
Author(s):  
Troy Snyder ◽  
Alex Povitsky
Keyword(s):  
Far Field ◽  
Induced Drag ◽  
Vorticity Confinement ◽  
Drag Prediction

scholarly journals Computational Drag Prediction of the DPW4 Configuration Using the Far-Field Approach

2011 ◽  
Vol 48 (5) ◽  
pp. 1658-1670 ◽  
Author(s):  
David Hue ◽  
Sebastien Esquieu
Keyword(s):  
Far Field ◽  
Field Approach ◽  
Drag Prediction

scholarly journals Development and Application of a New Unsteady Far-Field Drag Decomposition Method

AIAA Journal ◽  
2015 ◽  
Vol 53 (11) ◽  
pp. 3414-3429 ◽  
Author(s):  
Hélène Toubin ◽  
Didier Bailly
Keyword(s):  
Decomposition Method ◽  
Far Field
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