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Title Pulse combustion ;The mechanisms of NO sub x production
Creator/Author Keller, J.O. (Sandia National Labs., Livermore, CA (USA). Combustion Research Faclity) ; Hongo, I. (Consumer Products Engineering Lab., Toshiba Corp., Yokohama (JP))
Publication Date1990 Jun 01
OSTI IdentifierOSTI ID: 6545664
Other Number(s)ISSN0010-2180; CODEN: CBFMA
Resource TypeJournal Article
Resource RelationCombustion and Flame ; Vol/Issue: 80:3; DOE Project
Subject421000 -- Engineering-- Combustion Systems ;420400 -- Engineering-- Heat Transfer & Fluid Flow ;400800 -- Combustion, Pyrolysis, & High-Temperature Chemistry ;540120 -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-); EXHAUST GASES-- COOLING;NITROGEN OXIDES-- EMISSION;PULSE COMBUSTION-- COMBUSTION PRODUCTS; COMBUSTION CHAMBERS;HEAT TRANSFER
Related SubjectCHALCOGENIDES;CHEMICAL REACTIONS;COMBUSTION;ENERGY TRANSFER;FLUIDS;GASEOUS WASTES;GASES;NITROGEN COMPOUNDS;OXIDATION;OXIDES;OXYGEN COMPOUNDS;THERMOCHEMICAL PROCESSES;WASTES
Description/Abstract A study has been performed to elucidate the fundamental mechanisms controlling the production of NO in a Helmholtz-type pulse combustor.^Cycle-resolved measurements of velocity and temperature in the combustion chamber were made.^These measurements were combined with the Zeldovich NO formation mechanism to explain the mechanism responsible for the low NO formation found in pulse combustors.^The mechanism responsible for low NO formation found in pulsating flow as compared to nonpulsating flow was found to be a short residence time at high temperature.^Three different possible mechanisms for this short residence time are investigated: hot products from combustion are cooled by mixing with the cooler exhaust gases entering the combustion chamber from the tail pipe, thus quenching the NO formation reaction (automatic exhaust gas recirculation), hot combustion products are quickly cooled by mixing with the incoming cold reactants, and residual products with a lower overall temperature (due to an increased rate of heat transfer in the combustion chamber) readily mix with hot products producing a short residence time at high temperature.^It is shown that the mechanism responsible for the low NO emission in pulse combustors is a result of the third item.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 219-237
System Entry Date2001 May 13

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