Feedback control of separated flows(invited)

Mark N Glauser, Hiroshi Higuchi, Julie Ausseur, Jeremy Pinier, Henry Carlson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

49 Citations (Scopus)

Abstract

We are developing feedback control methods based on the use of Proper Orthogonal Decomposition POD and Modified Linear Stochastic Measurement mLSM for the flow over a NACA 4412 airfoil. By using a combination of Particle Image Velocimetry PIV and multiple surface pressure measurements, processed through a POD/mLSM algorithm, estimates of the velocity field from wall pressure alone are extracted. From such estimates knowledge of the state of the flow above the airfoil can be obtained (i.e., attached, fully separated or incipiently separated). Integral to the POD/mLSM algorithm is the measurement estimation of the global POD coefficients. Here we demonstrate for the first time the utility of these time dependent coefficients, which are estimated from surface pressure only, for use in a simple proportional feedback loop (as the time series to drive the actuators) to keep the flow attached. What is particularly exciting is that we are having success in a flow that is turbulent and incipiently separated. This methodology is critical for implementation of realistic feedback flow control since surface measurements and not inflow measurements are required for most practical applications.

Original languageEnglish (US)
Title of host publication2nd AIAA Flow Control Conference
StatePublished - 2004
Event2nd AIAA Flow Control Conference 2004 - Portland, OR, United States
Duration: Jun 28 2004Jul 1 2004

Other

Other2nd AIAA Flow Control Conference 2004
CountryUnited States
CityPortland, OR
Period6/28/047/1/04

Fingerprint

Feedback control
Surface measurement
Airfoils
Control surfaces
Pressure measurement
Flow control
Velocity measurement
Time series
Actuators
Decomposition
Feedback

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

Cite this

Glauser, M. N., Higuchi, H., Ausseur, J., Pinier, J., & Carlson, H. (2004). Feedback control of separated flows(invited). In 2nd AIAA Flow Control Conference

Feedback control of separated flows(invited). / Glauser, Mark N; Higuchi, Hiroshi; Ausseur, Julie; Pinier, Jeremy; Carlson, Henry.

2nd AIAA Flow Control Conference. 2004.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Glauser, MN, Higuchi, H, Ausseur, J, Pinier, J & Carlson, H 2004, Feedback control of separated flows(invited). in 2nd AIAA Flow Control Conference. 2nd AIAA Flow Control Conference 2004, Portland, OR, United States, 6/28/04.
Glauser MN, Higuchi H, Ausseur J, Pinier J, Carlson H. Feedback control of separated flows(invited). In 2nd AIAA Flow Control Conference. 2004
Glauser, Mark N ; Higuchi, Hiroshi ; Ausseur, Julie ; Pinier, Jeremy ; Carlson, Henry. / Feedback control of separated flows(invited). 2nd AIAA Flow Control Conference. 2004.
@inproceedings{f4be8d1351ef44bea3f5ce0e15510d33,
title = "Feedback control of separated flows(invited)",
abstract = "We are developing feedback control methods based on the use of Proper Orthogonal Decomposition POD and Modified Linear Stochastic Measurement mLSM for the flow over a NACA 4412 airfoil. By using a combination of Particle Image Velocimetry PIV and multiple surface pressure measurements, processed through a POD/mLSM algorithm, estimates of the velocity field from wall pressure alone are extracted. From such estimates knowledge of the state of the flow above the airfoil can be obtained (i.e., attached, fully separated or incipiently separated). Integral to the POD/mLSM algorithm is the measurement estimation of the global POD coefficients. Here we demonstrate for the first time the utility of these time dependent coefficients, which are estimated from surface pressure only, for use in a simple proportional feedback loop (as the time series to drive the actuators) to keep the flow attached. What is particularly exciting is that we are having success in a flow that is turbulent and incipiently separated. This methodology is critical for implementation of realistic feedback flow control since surface measurements and not inflow measurements are required for most practical applications.",
author = "Glauser, {Mark N} and Hiroshi Higuchi and Julie Ausseur and Jeremy Pinier and Henry Carlson",
year = "2004",
language = "English (US)",
isbn = "9781624100307",
booktitle = "2nd AIAA Flow Control Conference",

}

TY - GEN

T1 - Feedback control of separated flows(invited)

AU - Glauser, Mark N

AU - Higuchi, Hiroshi

AU - Ausseur, Julie

AU - Pinier, Jeremy

AU - Carlson, Henry

PY - 2004

Y1 - 2004

N2 - We are developing feedback control methods based on the use of Proper Orthogonal Decomposition POD and Modified Linear Stochastic Measurement mLSM for the flow over a NACA 4412 airfoil. By using a combination of Particle Image Velocimetry PIV and multiple surface pressure measurements, processed through a POD/mLSM algorithm, estimates of the velocity field from wall pressure alone are extracted. From such estimates knowledge of the state of the flow above the airfoil can be obtained (i.e., attached, fully separated or incipiently separated). Integral to the POD/mLSM algorithm is the measurement estimation of the global POD coefficients. Here we demonstrate for the first time the utility of these time dependent coefficients, which are estimated from surface pressure only, for use in a simple proportional feedback loop (as the time series to drive the actuators) to keep the flow attached. What is particularly exciting is that we are having success in a flow that is turbulent and incipiently separated. This methodology is critical for implementation of realistic feedback flow control since surface measurements and not inflow measurements are required for most practical applications.

AB - We are developing feedback control methods based on the use of Proper Orthogonal Decomposition POD and Modified Linear Stochastic Measurement mLSM for the flow over a NACA 4412 airfoil. By using a combination of Particle Image Velocimetry PIV and multiple surface pressure measurements, processed through a POD/mLSM algorithm, estimates of the velocity field from wall pressure alone are extracted. From such estimates knowledge of the state of the flow above the airfoil can be obtained (i.e., attached, fully separated or incipiently separated). Integral to the POD/mLSM algorithm is the measurement estimation of the global POD coefficients. Here we demonstrate for the first time the utility of these time dependent coefficients, which are estimated from surface pressure only, for use in a simple proportional feedback loop (as the time series to drive the actuators) to keep the flow attached. What is particularly exciting is that we are having success in a flow that is turbulent and incipiently separated. This methodology is critical for implementation of realistic feedback flow control since surface measurements and not inflow measurements are required for most practical applications.

UR - http://www.scopus.com/inward/record.url?scp=84897820499&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897820499&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84897820499

SN - 9781624100307

BT - 2nd AIAA Flow Control Conference

ER -