THE CHARACTERISTICS OF A SMALL VARIABLE GEOMETRY EJECTOR.
Abstract
The characteristics of a variable geometry ejector were studied experimentally. Reorienting the ejector diffuser doors produced minor changes in the magnitude of the thrust vector while significantly changing its direction. The ejector was found to be an effective mass augmentor, entraining approximately 7 pounds of ambient air per pound of primary air. However, the developed thrust was found to fall around 25 percent short of the thrust produced by an isentropic expansion of the same primary mass. Experiments with the ejector confined within a cylindrical shell indicated no discernable change in the level of thrust although a two or three degree change in thrust direction was measured. This was attributed to the interaction flow field established within the confinement cylinder. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1970
- Accession Number
- AD0709192
Entities
People
- Brian Quinn
Organizations
- Air Force Research Laboratory