Research on Cryptosteady-Flow Thrust Generators.
Abstract
This study focussed, from the start, on the 'rotary-jet' thrust augmenter, as developed at Rensselaer and tested at MacDonnell-Douglas, Grumman, the Naval Air Propulsion Test Center, and other facilities. In this device the primary (or driving) flow is discharged into the interaction space through skewed nozzles on the periphery of a free-spinning rotor, thereby forming the helical rotating patterns that are sometimes referred to as 'pseudoblades' The idea here is not to promote mixing (although this may be a side benefit), but rather to generate and utilize an additional mechanism for the transfer of mechanical energy from the primary to the secondary flow. This additional mechanism is 'pressure exchange'--the work of interface pressure forces. Since the pressure exchange component of energy transfer is essentially nondissipative, the performance of the rotary jet can be expected to be better than that on the conventional ejector--a fact that had already been confirmed experimentally prior to the start of this project.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA078497
Entities
Organizations
- George Washington University