| 摘要 |
A winglet 3 has an inner end 5 and an outer 7. The winglet 3 has a varying radius of curvature (R) which decreases along the winglet over a first distance d1, remains constant over a second distance d2 and increases along the winglet 3 over a third distance d3. The sum of the first and third distances (d1+d3) is greater than the second distance (d2). The radius of curvature may vary according to the equation R=k1/dn. The parameter n may be equal to 1, such that the curvature follows an Euler spiral. A method of designing a winglet is also disclosed wherein the method comprises modelling the stress distribution in the winglet and wing end and adjusting the curvature of the winglet to improve the stress distribution. |
