前言缘于各个航空公司纷纷追求市场份额和高经济效益的大环境,各国飞机制造商使用了尽可能的方法,来达到提高飞机效率从而节约飞机燃油的目的。而提高效率或升阻比的最显而易见的方法是通过提高真实的或有效的展弦比来减少诱导阻力。端板作为提高机翼有效展弦比的一种方法被认可已有多年了,二十世纪七十年代由美国NASA Langley的Whitcomb博士研发的升力面(即小翼)才在应用上取得真正意义上的突破。它已经不再是一个简单的物理上的屏障,该小翼用其周围的环流来抵抗翼尖周围的流动。从此以后,由于小翼真正能够实现在阻力上有意义的改进,因此其也就被 Preface Due to various airlines have to pursue market share and high economic benefits of the environment, the aircraft manufacturers in all countries to use as much as possible ways to achieve the goal of improving aircraft efficiency and thus saving aircraft fuel. The most obvious way to increase efficiency or lift-drag ratio is to reduce induced drag by increasing real or effective aspect ratio. Endplates have been recognized for many years as a way to increase the effective aspect ratio of the wings, and the lifting surface (ie, Winglets) developed by Dr. Whitcomb in NASA Langley in the 1970s made no real difference in application On the breakthrough. It is no longer a simple physical barrier, the winglets use around the circulation to resist the flow around the wingtip. Since then, Winglets have really been able to achieve meaningful improvements in resistance