Piezoelectric Pulsed Microjets
Abstract
This reports summarizes an investigation of coupling broadband piezoelectric actuators with large force microjet actuators to achieve pulsed flow control over a broad frequency range. The development is relevant to a range of flow control problems for rotorcraft noise control and dynamic stall, jet inlet flow separation, cavity bay flow control, etc. The results have provided multi-physics modeling describing the actuator dynamics, high fidelity aero-acoustic computations, and smart structure and fluid dynamic experimental characterization. It is shown that the piezoelectric actuator achieved pulsed flow actuation from quasi-static up to at least 1.6kHz. Pulsed supersonic microjet flow was confirmed using micro-schlieren imagery up to 800Hz. The first design was also extended to a highly compact microjet actuator capable of comparable pulsed actuation which is expected to facilitate technology transfer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 29, 2011
- Accession Number
- ADA546107
Entities
People
- Farrukh S. Alvi
- William S Oates
Organizations
- Florida State University