Theoretical analyses of generalized flow induction were carried out which showed that the least dissipative mode of flow induction is the cryptosteady mode. Studies were carried out on the energetics of vortex formation showing that in pulsatile thrust augmentors, considerable energy is carried away as kinetic energy of rotation. Parametric studies were conducted on rotary-jet thrust augmentation yielding a best thrust augmentation of 1.97. Theoretical and experimental studies on the utilization of propagating stall were conducted. The promise of eliminating moving parts for the rotary-jet thrust augmentor was explored and parametric testing was conducted to establish conditions for obtaining stall. Experiments showed, however, that stall is relatively difficult to obtain in configurations compatible with the rotary jet thrust augmentor.
Flow Induction by Rotary Jets
1986
30 pages
Report
Keine Angabe
Englisch
Jet & Gas Turbine Engines , Thrust augmentation , Jet engines , Dissipation , Energetic properties , Flow , Induction systems , Kinetic energy , Mechanical components , Parametric analysis , Pulses , Rotation , Stalling , Test methods , Theory , Vortices , Ejectors , Schlieren photography , Rotary Jet Engines
Flow induction by rotary jets.
AIAA | 1966
|Rotary Jet Flow Induction for Marine Propulsion
NTIS | 1987
|Ejectors and rotary jets as thrust augmenters
Tema Archiv | 1976
|Effects of density ratio on rotary jet flow induction
AIAA | 1971
|Contribution to the theory of rotary jet flow induction.
AIAA | 1966
|