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Published in:
Pressure Gain and Specific Impulse Measurements in a Constant-Volume Combustor Coupled to an Exhaust Plenum Read chapter Read first chapter

2022 | OriginalPaper | Chapter

A Comparison of Optimal, Binary Closed-Loop Active Flow Control Applied to an Annular Compressor Stator Cascade with Periodic Disturbances

Authors : Benjamin Fietzke, Jan Mihalyovics, Rudibert King, Dieter Peitsch

Published in: Active Flow and Combustion Control 2021

Publisher: Springer International Publishing

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Abstract

Pressure gain combustion has been proposed to exploit superior thermodynamic cycles in gas turbines. However, further research on their integration is needed to reduce the induced negative effects on the last stages of a compressor. In this contribution, mitigation results on the effects of periodic disturbances on an annular compressor stator rig are presented and compared for different closed-loop controllers. Instead of a real, unsteady combustion setup, a rotating disc was installed to create periodic disturbances downstream of each passage. Pneumatic active flow control served to influence the suction side of each stator blade.
With steady blowing actuation, the effects of periodically induced disturbances could not be explicitly addressed and led to worse results compared to the closed-loop versions. For closed-loop control, a clear recommendation for a class of learning approaches can be given. Finally, an evaluation of the efficiency of flow control is presented with a refined characterization of the actuation effort.

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previous chapter Experimental Investigations of Active Flow Control Using a Piezo Adaptive Blade in a Compressor Cascade Under Periodic Boundary Conditions with High Strouhal-Number
next chapter Numerical Methodologies for Magnetohydrodynamic Flow Control for Hypersonic Vehicles
Footnotes
1
This, of course, assumes that the cascade is rotational symmetric, all passages behave exactly the same, and other local disturbances do not occur.
 
2
The offset of the cost function is ignored here because it is not essential for the optimization program.
 
3
Meaning the \(n_{}-1\) time steps that are not used for solving the original BQP.
 
4
Note: Because the disturbance induced by the throttling disc is periodic, a period angle \(\varphi \) can be defined.
 
5
This results when fluctuating binary trajectories are averaged over several cycles.
 
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Metadata
Title
A Comparison of Optimal, Binary Closed-Loop Active Flow Control Applied to an Annular Compressor Stator Cascade with Periodic Disturbances
Authors
Benjamin Fietzke
Jan Mihalyovics
Rudibert King
Dieter Peitsch
Copyright Year
2022
Book
Active Flow and Combustion Control 2021

Print ISBN: 978-3-030-90726-6

Electronic ISBN: 978-3-030-90727-3

Copyright Year: 2022

DOI
https://doi.org/10.1007/978-3-030-90727-3_20

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