A semi-empirical control-volume approach to ejector modeling for transient performance prediction is presented. This new approach is motivated by the need for a predictive real-time ejector sub-system simulation for Short Take-Off Vertical Landing (STOVL) integrated flight and propulsion controls design applications. Emphasis is placed on discussion of the approximate characterization of the mixing process central to thrust augmenting ejector operation. The proposed ejector model suggests transient flow predictions are possible with a model based on steady-flow data. A practical test case is presented to illustrate model calibration.
Model for Prediction of STOVL (Short Take-Off Vertical Landing) Ejector Dynamics
1989
15 pages
Report
Keine Angabe
Englisch
Jet & Gas Turbine Engines , Aircraft , Fluid Mechanics , Ejectors , Performance prediction , Short takeoff aircraft , Steady flow , Thrust augmentation , Turbulence models , Computerized simulation , Boundary layers , Conservation equations , Finite volume method , Flow distribution , Kinetic energy , Navier-stokes equation , Propulsion system configurations , Real time operation , Semiempirical equations , Unsteady flow , Aircraft engines