A new actuation concept for flow control has been tested combining the high jet strength of chemically-based, combustion powered actuation with the high frequency of fluidic oscillators. The device exhausts the jet from a combustion powered actuator through a fluidic oscillator and embeds a high frequency [∼ O(1-10) kHz] oscillation into the lower frequency [∼ O(10-100) Hz] of the repetitively ignited combustion bursts. The present work includes characterization of the fluidic oscillator in steady operation for the properties which vary over the combustion burst (pressure, temperature, and gas composition) and results from test firing of the fully integrated device successfully indicating high frequency oscillation in the high speed actuation jet while maintaining a no moving parts design.
Combustion Powered Actuator with Integrated High Frequency Oscillator
Published Online: July 29, 2009
Abstract