The fundamental impact of the precessing vortex core (PVC) as a dominant coherent flow structure in the flow field of swirl-stabilized gas turbine combustors has still not been investigated in depth. In order to do so, the PVC needs to be actively controlled to be able to set its parameters independently to any other of the combustion system. In this work, open-loop actuation is applied in the mixing section between the swirler and the generic combustion chamber of a nonreacting swirling jet setup to investigate the receptivity of the PVC with regard to its lock-in behavior at different streamwise positions. The mean flow in the mixing section as well as in the combustion chamber is measured by stereoscopic particle image velocimetry (SPIV), and the PVC is extracted from the snapshots using proper orthogonal decomposition (POD). The lock-in experiments reveal the axial position in the mixing section that is most suitable for actuation. Furthermore, a global linear stability analysis (LSA) is conducted to determine the adjoint mode of the PVC which reveals the regions of highest receptivity to periodic actuation based on mean flow input only. This theoretical receptivity model is compared with the experimentally obtained receptivity data, and the applicability of the adjoint-based model for the prediction of optimal actuator designs is discussed.
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April 2019
Research-Article
Guiding Actuator Designs for Active Flow Control of the Precessing Vortex Core by Adjoint Linear Stability Analysis
Jens S. Müller,
Jens S. Müller
Institut für Strömungsmechanik und
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8,
Berlin 10623, Germany
e-mail: jens.mueller@tu-berlin.de
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8,
Berlin 10623, Germany
e-mail: jens.mueller@tu-berlin.de
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Finn Lückoff,
Finn Lückoff
Institut für Strömungsmechanik und
Technische Akustik,
Technische Universität Berlin,
Berlin 10623, Germany
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8
,Berlin 10623, Germany
Search for other works by this author on:
Kilian Oberleithner
Kilian Oberleithner
Institut für Strömungsmechanik und
Technische Akustik,
Technische Universität Berlin,
Berlin 10623, Germany
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8
,Berlin 10623, Germany
Search for other works by this author on:
Jens S. Müller
Institut für Strömungsmechanik und
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8,
Berlin 10623, Germany
e-mail: jens.mueller@tu-berlin.de
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8,
Berlin 10623, Germany
e-mail: jens.mueller@tu-berlin.de
Finn Lückoff
Institut für Strömungsmechanik und
Technische Akustik,
Technische Universität Berlin,
Berlin 10623, Germany
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8
,Berlin 10623, Germany
Kilian Oberleithner
Institut für Strömungsmechanik und
Technische Akustik,
Technische Universität Berlin,
Berlin 10623, Germany
Technische Akustik,
Technische Universität Berlin,
Müller-Breslau-Str. 8
,Berlin 10623, Germany
1Corresponding author.
Manuscript received June 22, 2018; final manuscript received July 5, 2018; published online December 7, 2018. Editor: Jerzy T. Sawicki.
J. Eng. Gas Turbines Power. Apr 2019, 141(4): 041028 (9 pages)
Published Online: December 7, 2018
Article history
Received:
June 22, 2018
Revised:
July 5, 2018
Citation
Müller, J. S., Lückoff, F., and Oberleithner, K. (December 7, 2018). "Guiding Actuator Designs for Active Flow Control of the Precessing Vortex Core by Adjoint Linear Stability Analysis." ASME. J. Eng. Gas Turbines Power. April 2019; 141(4): 041028. https://doi.org/10.1115/1.4040862
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