Application of Active Core Exhaust Control to Elliminate the Core Thrust Reverser on Heavy Lift Aircraft
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
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Pulsed jet blowing for mixing enhancement in a hot jet is examined using numerical simulation. Numerical simulations have been completed for a sub-scale turbojet engine a full scale ground demonstration case and a High-Bypass Ratio Engine HBRE. These simulations have shown that pulsed jet blowing can significantly reduce jet plume potential core lengths at static and forward flight conditions. The numerical scheme utilizes large timestep implicit integration for efficiency and a second order physical space algorithm for robustness. The pulsed jet disturbance is calculated directly and a turbulence model is employed to represent the cascade to smaller length scales. Experimental data corresponding to the numerical simulations are also presented and indicate similar benefits from pulsed jet mixing.
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- Jet and Gas Turbine Engines