可控环量帆翼在船舶上应用的研究

本文试验研究了一种可控环量帆翼,利用壁面切向喷流来移动帆翼圓尾缘分离点位置,可获得比普通帆翼更高的推力系数。文中介绍了展弦比为1的三维可控环量帆翼的试验研究。试验表明,这种可控环量帆翼在较小的喷流动量系数下,即可获得较大的升力增益。在喷流动量系数 C_μ=0.1时,零攻角升力系数已达0.9,在有攻角的情况下,升力系数最大可达2.2。同时,由于帆翼尾部壁面团向喷流的 Coanda 效应,这种可控环量帆翼的阻力亦较大。在喷流动量系数 C_μ=0.1时,零攻角阻力系数为0.3。文章对这种可控环量帆翼在船舶上的应用进行了讨论,并对其性能的进一步改进作了分析和探讨。

A STUDY OF THE APPLICATION OF CIRCULATION CONTROL WING ON SAIL ASSISTED SHIP

A circulation control wing of sail was studied experi-mentally.By utilizing a tangential wall jet blowing over the upper surfaceof a rounded trailing-edge wing of sail to move the trailing-edge separa-tion points,the wing of sail can get greater thrust coefficient.Thethree-dimensional experiments of the circulation control wing,whoseaspect is equal to one,were carried out.The results of the experimentsshow that this circulation control wing can get larger increment of liftat low blowing momentum coefficient.When the blowing momentum co-efficient C_u,=0.1,the lift coefficient of the wing reached 0.9 at zeroattack angle,and the maximum lift coefficient of the wing can get 2.2when the attack angle is not zero.On the other hand,because of theCoanda effect of the tangential wall jet,the drag of this circulationcontrol wing is quite large.When the blowing momentum coefficient C_u=0.1,the drag coefficent is egual to 0.3 at zero attack angle.Theapplication of this circulation control wing on sail assisted ship was dis-cussed,and the performance improvement of this wing was also analyzedand discussed in this paper.