High Reynolds Number Transonic Performance of Improved Planar Airfoils with Jet Flaps.
Abstract
For improved transonic cruise and maneuver performance, airfoil profiles were designed incorporating simultaneously, a 'peaky' nose, an aft camber, an aft upper surface humping, as well as jet flaps for the maneuver conditions. Three profiles were evolved and were tested in the NAE two dimensional transonic wind tunnel at high Reynolds numbers. The Basic Airfoil incorporated an aft camber and jet flaps, and was tested extensively in an earlier test carried out jointly with the NAE. Airfoil A had a peaky nose, aft camber, a moderate humping, and jet flaps, while the third profile, Airfoil B, was a non-blowing model with significant upper surface humping for use at the higher loadings. The results indicated that the Basic Airfoil, with or without blowing had the best overall performance, while without blowing Airfoil B had the best high M maneuver performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1971
- Accession Number
- AD0886531
Entities
People
- Demetrious Zonars
- Hideo Yoshihara
- Wilbert Carter
Organizations
- General Dynamics