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Main Title: Investigation of Fluidic Devices for Mixing Enhancement for the Shockless Explosion Combustion Process
Author(s): Bobusch, Bernhard
Berndt, Phillip
Paschereit, Christian Oliver
Klein, Rupert
Type: Preprint
Language: English
Language Code: en
Abstract: Fuel-air mixing is a crucial process in low emission combustion systems. A higher mixing quality leads to lower emissions and higher combustion efficiencies. Especially for the innovative constant volume combustion processes "Shockless Explosion Combustion" (SEC) the mixing of fuel and air is an important parameter, since the whole combustion process is triggered and controlled via the equivalence ratio. To enhance the passive scalar mixing, fluidic oscillators are investigated and compared to the standard jet in crossflow fuel injection configurations. The mixing quality of the different geometries is assessed in a water test-rig by making use of planar laser induced fluorescence. After a short introduction to the SEC-process, the test-rig and the different injection configurations are introduced. To verify whether the mixing quality is sufficient for the SEC-process, a numerical investigation using the experimentally determined unmixedness is conducted. It is not only shown that the fluidic oscillators are able to enhance the mixing quality and create an independence of the mixing quality from the jet in crossflow momentum, but it is also verified in a first numerical calculation that the achieved mixing quality might be good enough for the Shockless Explosion Combustion process.
Issue Date: Sep-2014
Date Available: 28-Oct-2015
Subject(s): mixing
constant volume combustion
shockless explosion combustion
numerical combustion
Appears in Collections:SFB 1029 - TurbIn » Proceedings of the Conference "Active Flow and Combustion Control 2014"

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