AIRFOIL STRUCTURE FOR WING VORTEX REDUCTION

摘要

The invention. is an airfoil structure for significant reduction of wing vortex. The structure consists of an outer portion and an inner portion. The outer portion is symmetrical, thin and of small chord length and its span from the tip is conveniently chosen. Being symmetrical the pressures over the upper and lower surfaces remain same as the airfoil moves in the fluid medium. Being thin and of small chord length the outer portion is of small volume. Both these prevent vortex formation at the outer portion. The inner portion's upper half is characterized by increasing upper bend's distance and height (upper camber's distance from the leading edge and its height from the chord) and by gradual change in the curvature of the upper up sloping surface such that the average angle of collision of relevant air molecules on this surface is lesser than that on the lower down sloping surface. Both these aspects of the upper half achieve gradual reduction of fluid pressure on the upper surface as one goes towards the root. The lower half is kept the same or almost same or may be absent (flat bottomed). This prevents the strength and amount of airflow, towards the root from the outer portion and downwards, minimal.