Emerging Researchers National (ERN) Conference

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Temporal Flow Characteristics of High-Frequency Supersonic Actuators Integrated in REM-Nozzle Assembly

Faculty #94
Discipline: Technology & Engineering
Subcategory: STEM Research
- Tuskegee University
Co-Author(s): Chitra Nayak, David Alexander, Leavon Lewis, Howard Javis


Temporal flow characteristics of a high-frequency supersonic actuator integrated to a nozzle-injector assembly designed for high-speed flow mixing is presented in this paper. This resonance enhanced microactuator nozzle system (REM-Nozzle) injects a fluid through four micro-nozzles of 400 μm diameter each positioned symmetrically around a 1.0 mm nozzle through which a high-frequency supersonic actuation jet pulses out in the frequency range of 13 – 21 kHz. Compressed CO2 is used as mixing fluid and compressed nitrogen is used for generating the actuation jet. The pulsed flow generates strong compressible vortex in the shear layer of steadily injected fluid that entrain and grows downstream enhancing microscale mixing of the injected fluid and nitrogen at very high-speed, and at a designated frequency. This paper summarizes the design details and characteristics of REM-nozzles,–a potential active injection scheme for efficient and controlled flow mixing in high-speed applications, and reports the ongoing studies on pulsed actuator using high-speed microschlieren imaging technique.

Funder Acknowledgement(s): NSF- RIA

Faculty Advisor: None Listed,

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This material is based upon work supported by the National Science Foundation (NSF) under Grant No. DUE-1930047. Any opinions, findings, interpretations, conclusions or recommendations expressed in this material are those of its authors and do not represent the views of the AAAS Board of Directors, the Council of AAAS, AAAS’ membership or the National Science Foundation.