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采用基于三维非结构直角网格的N-S求解器对机翼模型地效区的流场进行数值模拟。模型剖面为NACA4415,展弦比为2.33,并带有20%平均弦长的副翼及不同尺寸可移除的端板和中心板。通过对副翼偏转角、迎角、相对高度、端板尺寸及是否使用中心板和端板等因素对气动特性影响的研究,表明地面效应在相对高度小于一倍平均弦长时,影响较强;超过这个区域,影响逐渐较弱。其他条件相同时,增加端板尺寸,可有效提高升阻比;端板尺寸相同时,相对高度越小,端板效应越强。
N-S solver based on three-dimensional non-structural rectangular grid is used to simulate the flow field of the wing model. The model profile is NACA 4415 with an aspect ratio of 2.33 and an aileron with an average chord length of 20% and removable end plates and center plates of different sizes. The study of the influence of the ailerons on the aerodynamic characteristics by the deflection angle, angle of attack, relative height, end plate size and the use of center plate and end plate shows that the ground effect has a stronger effect when the relative height is less than one time the average chord length ; Beyond this area, the impact gradually weaker. Other conditions are the same, increase the size of the end plate can effectively improve the lift resistance ratio; the same end plate size, the relative height of the smaller, the stronger the effect of the end plate.