Please use this identifier to cite or link to this item:
https://doi.org/10.1007/s10494-015-9689-y
DC Field | Value | |
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dc.title | Prediction of Global Extinction Conditions and Dynamics in Swirling Non-premixed Flames Using LES/CMC Modelling | |
dc.contributor.author | Zhang, H | |
dc.contributor.author | Mastorakos, E | |
dc.date.accessioned | 2020-10-23T07:54:28Z | |
dc.date.available | 2020-10-23T07:54:28Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Zhang, H, Mastorakos, E (2016). Prediction of Global Extinction Conditions and Dynamics in Swirling Non-premixed Flames Using LES/CMC Modelling. Flow, Turbulence and Combustion 96 (4) : 863-889. ScholarBank@NUS Repository. https://doi.org/10.1007/s10494-015-9689-y | |
dc.identifier.issn | 1386-6184 | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/179572 | |
dc.description.abstract | The Large Eddy Simulation (LES)/three-dimensional Conditional Moment Closure (CMC) model with detailed chemistry is applied to predict the operating condition and dynamics of complete extinction (blow-off) in swirling non-premixed methane flames. Using model constants previously selected to provide relatively accurate predictions of the degree of local extinction in the piloted jet flames Sandia D ?F, the error in the blow-off air velocity predicted by LES/3D-CMC in short, recirculating flames with strong swirl for a range of fuel flow rates is within 25 % of the experimental value, which is considered a new and promising result for combustion LES that has not been applied before for the prediction of the whole blow-off curve in complex geometries. The results also show that during the blow-off transient, the total heat release gradually decreases over a duration that agrees well with experiment. The evolution of localized extinction, reactive scalars and scalar dissipation rate is analyzed. It has been observed that a consistent symptom for flames approaching blow-off is the appearance of high-frequency and high-magnitude fluctuations of the conditionally filtered stoichiometric scalar dissipation rate, resulting in an increased fraction of local extinction over the stoichiometric mixture fraction iso-surfaces. It is also shown that the blow-off time changes with the different blow-off conditions. © 2015, The Author(s). | |
dc.publisher | Springer Netherlands | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.source | Unpaywall 20201031 | |
dc.subject | Air | |
dc.subject | Combustion | |
dc.subject | Forecasting | |
dc.subject | Large eddy simulation | |
dc.subject | Accurate prediction | |
dc.subject | Blow off | |
dc.subject | Conditional moment closure | |
dc.subject | Localized extinctions | |
dc.subject | Non-premixed flame | |
dc.subject | Operating condition | |
dc.subject | Scalar dissipation rate | |
dc.subject | Stoichiometric mixture fraction | |
dc.subject | Flame research | |
dc.type | Article | |
dc.contributor.department | MECHANICAL ENGINEERING | |
dc.description.doi | 10.1007/s10494-015-9689-y | |
dc.description.sourcetitle | Flow, Turbulence and Combustion | |
dc.description.volume | 96 | |
dc.description.issue | 4 | |
dc.description.page | 863-889 | |
dc.published.state | Published | |
Appears in Collections: | Elements Staff Publications |
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