PERFORMANCE AND OPERATION OF QUASI TWO DIMENSIONAL JET FLAPS
Abstract
True two-dimensional and quasi two-dimensional jet-flap test results are evaluated for ex perimental evidence in favor or against the once much- disputed jet-flap thrust hypothesis. The thrust hypothesis is verified experimentally as conclusively as it has been proven theoretically. The development is presented of jet-flap char acteristics for truly and quasi two- dimensional jet-flapped wings. For any desired lift, it renders any number of combinations of rate of blowing, jet-deflection angle, and angle of attack which can produce this lift. Besides, it permits that amount of the jet-sheet thrust which can be recovered as propulsive thrust or which is nullified by the drag of the jet-flapped wing to be read off simultaneously. The ratio of these values reflects on the performance and economy of operation of this wing. If then, the production of a specific lift is optimized with respect to the lowest expenditure in blowing at the smallest possible drag, an 'operating line' can be defined and added to the jet-flap 'char acteristics'. The range of economical jet-flap operation was found to coincide with the region in which any change in the rate of blowing results in exactly the same change in the measured thrust
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1963
- Accession Number
- AD0426783
Entities
People
- G. K. Korbacher
Organizations
- University of Toronto