The Influence of Near-Wake Assumptions on the Lifting Characteristics of a Rotor Blade.
Abstract
A study of the interrelation between a simplified wake model and the loading on a rotor blade has been made. For this model the wake is treated as an infinite vortex sheet of simplified shape in quasi-steady flow and an iterative scheme is used to solve the downwash equation on the blade derived from lifting surface theory. Using this model as a basis a comparison has been made of the influence of some near-wake assumptions on the lifting characteristics of a rotor blade. In particular the treatment of 'sweep effects' and the 'vortex lattice approximation for vorticity' have been studied. Based on the latter comparisons a scheme is proposed whereby the near-wake model studied in this Report could be used to improve the wake representation for a complete rotor performance computer program. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1971
- Accession Number
- AD0732026
Entities
People
- J. G. Woodley
Organizations
- Royal Aircraft Establishment