NDLI: Residence Time Distribution in a Swirling Flow at Non-Reacting, Reacting, and Steam-Diluted Conditions

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Göckeler, Katharina Terhaar, Steffen Paschereit, Christian Oliver
Copyright Year	2013
Abstract	Residence time distributions in a swirling, premixed combustor flow are determined by means of tracer experiments and a reactor network model. The measurements were conducted at non-reacting, reacting, and steam-diluted reacting conditions for steam contents of up to 30% of the air mass flow. The tracer distribution was obtained from the light scattering of seeding particles employing the quantitative light sheet technique (QLS). At steady operating conditions, a positive step of particle feed was applied, yielding cumulative distribution functions (CDF) for the tracer response. The shape of the curve is characteristic for the local degree of mixedness. Fresh and recirculating gases were found to mix rapidly at non-reacting and highly steam diluted conditions, whereas mixing was more gradual at dry reacting conditions. The instantaneous mixing near the burner outlet is related to the presence of a large scale helical structure, which was suppressed at dry reacting conditions. Zones of similar mixing time scales, such as the recirculation zones, are identified. The CDF curves in these zones are reproduced by a network model of plug flow and perfectly mixed flow reactors. Reactor residence times and inlet volume flow fractions obtained in this way provide data for kinetic network models.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791855119
DOI	10.1115/GT2013-95594
Volume Number	Volume 1B: Combustion, Fuels and Emissions
Conference Proceedings	ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2013-06-03
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Gases Swirling flow Particulate matter Light scattering Steam Network models Shapes Combustion chambers Flow (dynamics)
Content Type	Text
Resource Type	Article

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