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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Proceedings of the C...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Proceedings of the Combustion Institute
Article . 2015 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
https://doi.org/10.1364/lic.20...
Article . 2015 . Peer-reviewed
Data sources: Crossref
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Plasma assisted combustor dynamics control

Authors: Wookyung Kim; Jordan Snyder; Jeffrey Cohen;

Plasma assisted combustor dynamics control

Abstract

Abstract The primary purpose of the current research is to demonstrate and interpret the effectiveness of implementing a plasma discharge to improve combustor dynamics and flame stability. Specifically, a nano-second pulsed plasma discharge (NSPD) was applied to a premixed methane/air dump combustor for mitigation of dynamic combustion instabilities with a minimal NO X penalty. As a result, up to ∼25 dB noise reduction was observed in the presence of the NSPD. High speed imaging suggests that the NSPD relocated the flame stabilization point from the outer recirculation zone to the center zone. Due to the highly non-equilibrium temperature characteristic of the NSPD, the incremental increase of emissions in the presence of the discharge was minimal, typically around 0.5 EINO X , while the increase of combustion efficiency could be significant and on the order of ∼10%. A new control algorithm that measured pressure oscillation amplitude, and actuated with plasma power was developed. This algorithm does not require knowledge/measurement of pressure oscillation phase, and therefore, avoids challenges associated with convective and actuator phase delays. The impact of NSPD on swirl-stabilized flames was also investigated for swirl numbers from 0 to 0.33. It is shown that the relative effect of NSPD for dynamics reduction decreases with increasing swirl due to the inherent decrease in nascent flame dynamics. All observations in the current work suggest that the flame shape plays a central role in determining the degree of plasma effectiveness and that any noisy, outer recirculation zone stabilized flames will be significantly improved by this implementation of NSPD. Potential impacts for advanced combustor concepts with wider operability are also discussed.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
66
Top 1%
Top 10%
Top 10%
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