Real-Time Feedback Control of Mixing in a Heated Jet
Final rept. 15 May 1997-30 Sep 2000
BOEING CO ST LOUIS MO PHANTOM WORKS
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This report describes work performed to investigate real-time feedback control of mixing in a heated jet and to demonstrate the resulting technique in a laboratory environment. Large- scale direct numerical simulations were performed for jets with various types of actuation and were useful for optimization of the actuators with regard to Strouhal number and amplitude. The integral of the squared velocity and the integral of the concentration were found to be appropriate objective functions for evaluating the performance of a given actuator. In the simulation effort evolution strategies and simulated annealing were used for optimization of the jet actuators. In an experimental study of a jet using a miniature RAM 750 engine, use of a genetic algorithm showed that it could drive the system to undesirable states during optimization. A classical proportional-integral controller was used to provide real-time feedback control of plume temperature.
- Fluid Mechanics
- Combustion and Ignition