Accession Number : AD0853067

Title :   An Interferometer Study of Air Flow Near the Exit of a Constant Area Duct.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Havener,Albert G.

Report Date : MAR 1969

Pagination or Media Count : 63

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)

Descriptors :   (*DUCTS, *COMPRESSIBLE FLOW), AIR, SKIN FRICTION, SUBSONIC CHARACTERISTICS, INTERFEROMETERS, SCHLIEREN PHOTOGRAPHY, TWO DIMENSIONAL FLOW, CONVERGENT DIVERGENT NOZZLES, THESES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE