Low-dimensional methods including the Proper Orthogonal Decomposition (POD) and Linear Stochastic Estimation (LSE) have been applied to the flow between a backward facing ramp and an adjustable flap. A range of flap angles provide a flow which is incipiently separated and can be used to flesh out ideas for active feedback separation control strategies. The current study couples Particle Image Velocimetry (PIV) and multi-point wall pressure measurements using POD and LSE to estimate the full velocity field from the wall pressure alone. This technique yields a sufficiently accurate estimate of the velocity field that the incipient condition can be detected. The ability to estimate the state of the flow without inserting probes into the flow is important for the development of practical active feedback flow control strategies.
Towards Practical Flow Sensing and Control via POD and LSE Based Low-Dimensional Tools
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division June 12, 2003; revised manuscript received December 10, 2003. Associate Editor: H. Johari.
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Taylor, J. A., and Glauser, M. N. (July 12, 2004). "Towards Practical Flow Sensing and Control via POD and LSE Based Low-Dimensional Tools ." ASME. J. Fluids Eng. May 2004; 126(3): 337–345. https://doi.org/10.1115/1.1760540
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