A Bayesian approach to the determination of ignition delay

Bodisco, Timothy, Low Choy, Samantha and Brown, Richard J 2013, A Bayesian approach to the determination of ignition delay, Applied thermal engineering, vol. 60, no. 1-2, pp. 79-87, doi: 10.1016/j.applthermaleng.2013.06.048.

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Title A Bayesian approach to the determination of ignition delay
Author(s) Bodisco, TimothyORCID iD for Bodisco, Timothy orcid.org/0000-0002-5163-4762
Low Choy, Samantha
Brown, Richard J
Journal name Applied thermal engineering
Volume number 60
Issue number 1-2
Start page 79
End page 87
Total pages 9
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2013-10
ISSN 1873-5606
Keyword(s) Ignition delay
Diesel engine
Bayesian modelling
Markov-chain Monte Carlo
Net rate of heat release
Summary A novel in-cylinder pressure method for determining ignition delay has been proposed and demonstrated. This method proposes a new Bayesian statistical model to resolve the start of combustion, defined as being the point at which the band-pass in-cylinder pressure deviates from background noise and the combustion resonance begins. Further, it is demonstrated that this method is still accurate in situations where there is noise present. The start of combustion can be resolved for each cycle without the need for ad hoc methods such as cycle averaging. Therefore, this method allows for analysis of consecutive cycles and inter-cycle variability studies. Ignition delay obtained by this method and by the net rate of heat release have been shown to give good agreement. However, the use of combustion resonance to determine the start of combustion is preferable over the net rate of heat release method because it does not rely on knowledge of heat losses and will still function accurately in the presence of noise. Results for a six-cylinder turbo-charged common-rail diesel engine run with neat diesel fuel at full, three quarters and half load have been presented. Under these conditions the ignition delay was shown to increase as the load was decreased with a significant increase in ignition delay at half load, when compared with three quarter and full loads.
Language eng
DOI 10.1016/j.applthermaleng.2013.06.048
Field of Research 090599 Civil Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30082237

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