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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (9): 623045-623045.doi: 10.7527/S1000-6893.2019.23045

• Special Column of BWB Civil Aircraft Technology • Previous Articles     Next Articles

High-lift technology for spoiler on blended-wing-body civil aircraft

WANG Gang1, ZHANG Minghui1, MAO Jun2, SANG Weimin1, CHEN Zhenli1, WANG Long3, ZHANG Binqian1   

  1. 1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
    2. Shanghai Aircraft Design and Research Institute, Commercial Aircraft Corporation of China, Ltd., Shanghai 201210, China;
    3. AVIC Huiyang Aviation Propeller Co., Ltd., Baoding 071051, China
  • Received:2019-03-25 Revised:2019-04-03 Online:2019-09-15 Published:2019-05-10
  • Supported by:
    The Fundamental Research Funds for the Central Universities (3102019JC009, G2016KY0002)

Abstract: To meet the design requirements for the high-lift device of Blended-Wing-Body (BWB) civil aircraft with simplicity and high efficiency, the BWB high-lift configuration with three-element high-lift device is numerically simulated to study the mechanism of lift-enhancement and design principles of the drooped spoiler technology. The research results show that the reasonable design of the drooped spoiler can increase the design point lift coefficient of the BWB high-lift configuration by almost 20%. The lift-enhancement mechanism of the drooped spoiler is mainly concentrated on the control of the slot-jet, the energy distribution of the flow field, the circulation, and its distribution. The design principles of the drooped spoiler for BWB civil aircraft are as follows:the deflection of the drooped spoiler should be tangent to the upper surface of the flap; the gap width should be narrowed to enhance the circulation and move it forward; and the deflection of the internal spoiler should be limited to avoid premature separation. The study also shows that, with the influence of the three-dimensional effect of the high-lift device, the stronger the up-washing effect of spoiler deflected airfoils, the greater the lift loss of the three-dimensional high-lift device, showing an almost linear pattern of variation. Since it is simple to reconstruct and helps to simplify the flap operating mechanism, the drooped spoiler is a potential high-lift improvement technology, demonstrating in-depth research values and good application prospects.

Key words: blended-wing-body, civil aircraft, high-lift device, drooped spoiler, CFD

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