ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Configuration Optimization of Subsonic Blended Wing Body UAV Conceptual Design
Received date: 2013-07-08
Revised date: 2013-10-12
Online published: 2013-11-16
Supported by
National Defense Basic Scientific Research Program of China(A2520110006); The Fundamental Research Funds for the Central Universities (NJ20130001, NZ2012014)
A configuration optimization method for a notional subsonic unmanned aerial vehicle (UAV) with a blended wing body (BWB) is proposed for simultaneous considerations of the requirements of aerodynamics, stealth and structural mass. The process of the configuration optimization consists of parametric configuration modeling, analysis for the aerodynamic characteristics, computation of the wing bending moment, prediction of radar cross section (RCS), creation of the surrogate model and optimization for the configuration parameters. Three cases with different design objectives for the configuration optimization of the blended wing body unmanned aerial vehicle are studied: ① maximization for the lift to drag ratio without the trim constraint; ② maximization for the lift to drag ratio with the trim constraint; and ③ maximization for the lift to drag ratio and minimization for the wing bending moment with the trim constraint. Impacts of the trim constraint and the wing bending moment on the optimal designs are investigated through the comparisons of the optimal results. It concludes that the inclusion of the trim constraint can increase the lift to drag ratio of the unmanned aerial vehicle configuration under the trim condition, and the lift to drag ratio and wing bending moment should be simultaneously considered as the design objectives to obtain a practicaloptimal configuration of the blended wing body unmanned aerial vehicle.
DENG Haiqiang , YU Xiongqing . Configuration Optimization of Subsonic Blended Wing Body UAV Conceptual Design[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(5) : 1200 -1208 . DOI: 10.7527/S1000-6893.2013.0431
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