定常吹气对无缝襟翼翼型地面效应影响的数值模拟

发布时间：2018-03-20 18:26

本文选题：定常吹气　切入点：地面效应　出处：《航空学报》2017年06期 　论文类型：期刊论文

【摘要】：随着对生产成本、性能和可靠性、环境要求的不断提高,未来运输类飞机的发展趋势是具有更大的载重、更短的起降距离、更低的污染排放和噪声,因此迫切需要采用更高效和简单的增升和控制技术,而采用狭缝吹气的主动流动控制增强升力的方式已经被证明是最值得研究推广的应用技术之一。而在分析飞机起降性能时,必须要考虑到地面效应的影响,因此有必要对采用吹气进行增升的翼型地面效应进行研究。通过数值模拟方法研究了定常吹气对某无缝襟翼翼型地面效应的影响,研究表明,近地面在襟翼前缘施加吹气控制后,与远地面施加定常吹气控制相比,翼型升力线斜率和升力明显降低;小迎角下,动量系数为0.005时,升力随着距地高度的减小先减小后增加,动量系数增加到0.01后,升力随着距地高度的减小而减小;无缝襟翼翼型在不同动量系数和不同距地高度时出现的不同程度升力减小的现象,能直接影响飞机的起降性能,是采用吹气控制进行增升设计时必须考虑的因素。
[Abstract]:With the continuous improvement of production cost, performance and reliability, environmental requirements, the development trend of future transport aircraft is to have greater load, shorter take-off and landing distance, lower pollution emissions and noise. Therefore, more efficient and simple lifting and control techniques are urgently needed, and the active flow control with slit blowing to enhance lift has been proved to be one of the most worthy application techniques to be studied and popularized, and in the analysis of aircraft takeoff and landing performance, The influence of ground effect must be taken into account, so it is necessary to study the ground effect of airfoil which is raised by blowing air. The effect of steady blowing on the ground effect of a seamless flap airfoil is studied by numerical simulation. The slope and lift of the airfoil lift line are obviously reduced when the near surface is controlled by blowing at the leading edge of the flap, and the lift force decreases first and then increases with the decrease of the height of the ground when the momentum coefficient is 0.005 at the small angle of attack. When the momentum coefficient is increased to 0.01, the lift force decreases with the decrease of the altitude from the ground, and the phenomenon of different degrees of lift reduction in the airfoil of seamless flaps at different momentum coefficients and at different altitudes from the ground can directly affect the take-off and landing performance of the aircraft. It is a factor that must be taken into account in the design of raising by air blowing control.
【作者单位】：西北工业大学航空学院;中国空气动力研究与发展中心;空气动力学国家重点实验室;
【分类号】：V211.41

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