Autoignition and combustion of n-hexane spray in subcritical and supercritical environments

Łukasz Kapusta , Ireneusz Pielecha , Krzysztof Wisłocki , Andrzej Teodorczyk


In this study, processes of a liquid fuel spray ignition and heat release during its combustion were under investigation. The purpose of this study was to elucidate whether the ignition properties and heat release process of a liquid fuel injected into the environments of parameters exceeding its critical values differ from those obtained for subcritical regimes. Therefore, the fuel was injected into the environments of parameters below, around and above its critical values. The ignition and combustion processes were observed by monitoring the pressure in the combustion chamber and by using a high-speed camera through transparent piston. The ignition process was characterized by ignition delay, while the combustion process by heat release and rate of heat release. The ignition delay was determined by pressure rise according to tangential method. Ignition delay determined that way included both physical delay and chemical delay. Obtained results revealed stochastic nature of the spray ignition of n-hexane. No major difference in ignition delay in terms of exceeding critical parameters was noticed. The only parameter directly influencing the ignition delay was the injectant initial temperature
Author Łukasz Kapusta ITC
Łukasz Kapusta,,
- The Institute of Heat Engineering
, Ireneusz Pielecha
Ireneusz Pielecha,,
, Krzysztof Wisłocki
Krzysztof Wisłocki,,
, Andrzej Teodorczyk ITC
Andrzej Teodorczyk,,
- The Institute of Heat Engineering
Journal seriesJournal of Thermal Analysis and Calorimetry, ISSN 1388-6150
Issue year2016
Publication size in sheets40.95
Keywords in PolishSamozapłon, opóźnienie samozapłonu, spalanie strugi cieczy, maszyna pojedynczego sprężu, wtrysk
Keywords in EnglishAutoignition; Ignition delay; Spray combustion; Rapid compression Machine; Injection
Abstract in Polishbrak
Languageen angielski
Score (nominal)25
ScoreMinisterial score = 20.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.953 (2) - 2016=1.69 (5)
Citation count*2 (2017-04-12)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.