Real-time feedback control of 3D Tollmien-Schlichting waves using a dual-slot actuator geometry
File(s)
Accepted version
Author(s)
Vemuri, H
Bosworth, R
Morrison, JF
Kerrigan, EC
Type
Journal Article
Abstract
The growth of Tollmien-Schlichting (TS) waves is experimentally attenuated using a single-input
and single-output (SISO) feedback system, where the TS wave packet is generated by a surface
point source in a flat-plate boundary layer. The SISO system consists of a single wall-mounted
hot wire as the sensor and a miniature speaker as the actuator. The actuation is achieved through
a dual-slot geometry to minimise the cavity near-field effects on the sensor. The experimental
set-up to generate TS waves or wave packets is very similar to that used by Li and Gaster [1]. The
aim is to investigate the performance of the SISO control system in attenuating single-frequency,
two-dimensional disturbances generated by these configurations. The necessary plant models are
obtained using system identification, the controllers are then designed based on the models and
implemented in real-time to test their performance. Cancellation of the rms streamwise velocity
fluctuation of TS waves is evident over a significant domain.
and single-output (SISO) feedback system, where the TS wave packet is generated by a surface
point source in a flat-plate boundary layer. The SISO system consists of a single wall-mounted
hot wire as the sensor and a miniature speaker as the actuator. The actuation is achieved through
a dual-slot geometry to minimise the cavity near-field effects on the sensor. The experimental
set-up to generate TS waves or wave packets is very similar to that used by Li and Gaster [1]. The
aim is to investigate the performance of the SISO control system in attenuating single-frequency,
two-dimensional disturbances generated by these configurations. The necessary plant models are
obtained using system identification, the controllers are then designed based on the models and
implemented in real-time to test their performance. Cancellation of the rms streamwise velocity
fluctuation of TS waves is evident over a significant domain.
Date Issued
2018-05-21
Date Acceptance
2018-04-19
Citation
Physical Review Fluids, 2018, 3 (3)
ISSN
2469-990X
Publisher
American Physical Society
Journal / Book Title
Physical Review Fluids
Volume
3
Issue
3
Copyright Statement
©2018 American Physical Society
Sponsor
Engineering & Physical Science Research Council (E
EADS UK Limited
Grant Number
EP/I037946/1
PO 8000031666/U01
Subjects
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
LAMINAR-INSTABILITY WAVES
BOUNDARY-LAYER
ACTIVE CONTROL
TRANSITION
DISTURBANCES
CANCELLATION
Publication Status
Published
Article Number
053903