Next Article in Journal
Anguilliform Locomotion across a Natural Range of Swimming Speeds
Next Article in Special Issue
Integration of Fluidic Nozzles in the New Low Emission Dual Fuel Combustion System for MGT Gas Turbines
Previous Article in Journal
Heat and Mass Transfer Analysis on Magneto Micropolar Fluid Flow with Heat Absorption in Induced Magnetic Field
Previous Article in Special Issue
Fluidic Oscillators Mediating Generation of Microbubbles (Survey)
Article

Design of a Fluidic Actuator with Independent Frequency and Amplitude Modulation for Control of Swirl Flame Dynamics

1
Laboratory for Flow Instabilities and Dynamics, Technische Universität Berlin, Müller-Breslau-Straße 8, 10623 Berlin, Germany
2
FDX Fluid Dynamix GmbH, Rohrdamm 88, 13629 Berlin, Germany
*
Authors to whom correspondence should be addressed.
Academic Editor: V’yacheslav Akkerman
Fluids 2021, 6(3), 128; https://doi.org/10.3390/fluids6030128
Received: 26 February 2021 / Revised: 15 March 2021 / Accepted: 17 March 2021 / Published: 20 March 2021
(This article belongs to the Special Issue Fluidic Oscillators-Devices and Applications)
Fluidic actuators are designed to control the oscillatory helical mode, called a precessing vortex core (PVC), which is often observed in gas turbine combustors. The PVC induces large-scale hydrodynamic coherent structures, which can considerably affect flow and flame dynamics. Therefore, appropriate control of this structure can lead to a more stable and efficient combustion process. Currently available flow control systems are designed to control the PVC in laboratory-scale setups. To further develop these systems and find an approach applicable to the industrial scale, a new actuator design based on fluidic oscillators is presented and studied in this paper. This actuator allows for independently adjusting forcing frequency and amplitude, which is necessary to effectively target the dynamics of the PVC. The functionality and flow control of this actuator design are studied based on numerical simulations and experimental measurements. To verify the flow control authority, the actuator is built into a prototype combustor test rig, which allows for investigating the impact of the actuator’s forcing on the PVC at isothermal conditions. The studies conducted in this work prove the desired functionality and flow control authority of the 3D-printed actuator. Accordingly, a two-part stainless steel design is derived for future test conditions with flame. View Full-Text
Keywords: active flow control; fluidic oscillator; precessing vortex core; swirl flame dynamics active flow control; fluidic oscillator; precessing vortex core; swirl flame dynamics
Show Figures

Figure 1

MDPI and ACS Style

Adhikari, A.; Schweitzer, T.; Lückoff, F.; Oberleithner, K. Design of a Fluidic Actuator with Independent Frequency and Amplitude Modulation for Control of Swirl Flame Dynamics. Fluids 2021, 6, 128. https://doi.org/10.3390/fluids6030128

AMA Style

Adhikari A, Schweitzer T, Lückoff F, Oberleithner K. Design of a Fluidic Actuator with Independent Frequency and Amplitude Modulation for Control of Swirl Flame Dynamics. Fluids. 2021; 6(3):128. https://doi.org/10.3390/fluids6030128

Chicago/Turabian Style

Adhikari, Amrit, Thorge Schweitzer, Finn Lückoff, and Kilian Oberleithner. 2021. "Design of a Fluidic Actuator with Independent Frequency and Amplitude Modulation for Control of Swirl Flame Dynamics" Fluids 6, no. 3: 128. https://doi.org/10.3390/fluids6030128

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop