Experimental Observations of the Two-Dimensional Power Augmented Ram Wing Operated Statically Over Water.
Abstract
Experiments were performed in a rectangular tank, partially filled with water and spanned by a flat-bottomed airfoil section, derived from an NACA 0015 thickness distribution. Upstream of the airfoil was placed a two-dimensional air jet, also spanning the tank. One side of the tank was transparent, to permit flow visualization. Two-dimensional turbulent jet theory was used to establish the relationship between the jet exit dynamic pressure and the pressure recovery under the wing, which was supported by experimental evidence. It was found that the recovery of pressure was not highly sensitive to jet geometry; however, the formation of spray was. For minimum spray formation, a jet impingement angle of about 25 deg was established. Several interesting wind-wave flow instabilities were observed. A thrust-reversal phenomenon, predicted by inviscid theory, could not be duplicated in the present experiment. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1977
- Accession Number
- ADA038163
Entities
People
- B. H. Carson
- David W Taylor