Accession Number : ADA268648


Title :   Characteristics of Deformable Leading Edge for High Performance Rotor


Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER


Personal Author(s) : Lee, S ; McAlister, K W ; Tung, C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a268648.pdf


Report Date : Aug 1993


Pagination or Media Count : 22


Abstract : The deformable leading edge (DLE) concept to improve the blade capability in lift, drag and pitching moments has been investigated for the purpose of meeting new rotor maneuverability and susceptibility requirements. The advantages and disadvantages of this concept have been carefully examined with limited computational and experimental results. This work showed that this concept achieves a substantial improvement in lift capability and also reduces the drag and pitching moment at the same time. Effects of various parameters, such as Reynolds number, reduced frequency, mean angle of oscillation, and airfoil shape, on the performance of these airfoils were also investigated.


Descriptors :   *HELICOPTER ROTORS , *ROTOR BLADES(ROTARY WINGS) , *LEADING EDGES , FREQUENCY , REQUIREMENTS , ANGLES , AIRFOILS , MEAN , DRAG , REYNOLDS NUMBER , OSCILLATION , LIFT , ROTORS , NUMBERS , WORK , TIME , MANEUVERABILITY , PARAMETERS , SHAPE , MOMENTS


Subject Categories : Helicopters


Distribution Statement : APPROVED FOR PUBLIC RELEASE