针对常规垂直起降飞机起飞阶段存在的不足,基于螺旋桨滑流诱导增升的设计思路,提出了翼上螺旋桨布局和耦合动力的双层翼布局以提高全机在巡航、悬停、垂直起飞状态下的气动性能.采用CFD数值模拟方法研究分析了在二维流动情况下不同布局参数对2种新型布局气动力的影响规律.计算结果表明:通过合理利用螺旋桨滑流,2种布局的升力系数相比于常规拉力螺旋桨布局均有明显的提升,最大升力系数增量可达14.8%,而阻力系数则急剧减小并出现了负阻力值.在零来流速度条件下,耦合动力的双层翼布局依靠螺旋桨滑流的加速效应能够对翼面诱导出升力,从而可最终减小全机在悬停、垂直起飞阶段的功率需求,这一结果证明了利用滑流诱导增升的思路是可行的.%According to the assumption making use of the propeller slipstream to increase the lift of the aircraft, two new configurations, i.e., the over-the-airfoil propeller aerodynamic configuration and the new double airfoil configuration coupled with a propeller, are investigated for the purpose of improving the performances of the vertical take-off aircraft during the phases of cruise, hovering and vertical take-off.The Computational Fluid Dynamics (CFD) technology is utilized to investigate the change regulations of these two new configurations affected by the configuration parameters in a two dimensional flow The simulated results indicate that the lift coefficients of these two configurations can be apparently augmented by using the propeller slipstream correctly and the maximum of the lift coefficient increment can be achieved by 14.8%.However, the drag coefficients are reduced significantly, even to be a minus value.With a zero free stream velocity, the axial acceleration of the propeller slipstream still has the ability of inducing some lift on the airfoil for the propeller-coupled double airfoil configuration, as a result, the necessary engine power at the phases of cruise and vertical take-off can be decreased ,respectively.Meanwhile, the generation of the induced lift can proof that the assumption described above is practicable.
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