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Aerodynamic Optimization Design for After-body of Tail-mounted Engine Layout Considering Interference of Engines
Received date: 2013-09-24
Revised date: 2014-02-14
Online published: 2014-02-21
Aimed at reducing tail-mounted engine layout civil after-body drag with the interference of engines, we establish an aerodynamic optimization design system for the complex configurations. The design system is established with free formed deformation (FFD) parameterization method, radial basis functions (RBF) dynamic mesh method based on compact support function, computational fluid dynamics (CFD) technology, Kriging metamodeling and improved differential evolution algorithm. The optimization design system is used in after-body drag reduction design and then a decrease of 2.67% in the total drag is obtained. From the analysis of flow field, the change of the stream tube shape between after-body and nacelle reduces the unfavorable interference, eliminates the flow separation and weakens the shock strength, and then reduces the drag. The results show that the aerodynamic optimization design system constructed in this paper has good practicability in dealing with the tail-mounted engine layout civil after-body drag reduction problem.
YANG Tihao , BAI Junqiang , WANG Dan , CHEN Song , XU Jiakuan , CHEN Yuanyuan . Aerodynamic Optimization Design for After-body of Tail-mounted Engine Layout Considering Interference of Engines[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(7) : 1836 -1844 . DOI: 10.7527/S1000-6893.2013.0541
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