An Interferometer Study of Air Flow Near the Exit of a Constant Area Duct.
Abstract
A Mach-Zehnder interferometer was used to investigate the flow of air, choked by friction, near the exit of a constant area duct. Velocity profiles were obtained and streamlines were defined in the last 2 1/4 in of the duct. The existence of an apparent convergent-divergent nozzle in the exit region was determined from both the streamline configurations and the local fluid property variations along the centerline. The flow in the exit plane was strongly influenced by expansion waves, and in certain cases, the local velocities near the walls of the duct were higher than the mid-stream velocities. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1969
- Accession Number
- AD0853067
Entities
People
- Albert G. Havener
Organizations
- Air Force Institute of Technology