Improved Combustion Kinetic Model And Hcci Engine Simulations Of Di-Isopropyl Ketone Ignition
Keywords
Combustion kinetics; HCCI; Ignition; Ketone fuels; Modeling
Abstract
Di-isopropyl ketone (DIPK) is considered a promising biofuel candidate produced using endophytic fungal conversion. In the current study, homogeneous charge compression ignition (HCCI) simulations of DIPK engine experiments were conducted with single-zone and multi-zone engine models. Both adiabatic and non-adiabatic single-zone HCCI models were explored. The non-adiabatic model employed the Woschni correlation to account for heat transfer observed in the experiments. The HCCI simulations utilized a literature DIPK kinetic model with slight modifications to better reproduce experimental data. The modifications were done by including additional intermediate species and radical reactions, which were not considered in the original reaction mechanism. In addition, zero dimensional simulations were conducted to validate the updated model against limited shock tube and pyrolysis experimental data available in the literature. The single-zone model of HCCI engine with the updated kinetic model provided good agreement for pressure during compression until ignition, however, it over predicted the peak pressure, as expected. The improved kinetic mechanism was able to predict the pressure, heat release rate, and temperature in a 5-zone model of HCCI engine with good agreement to the experiments. Brute force sensitivity analyses revealed that the most sensitive reaction in which DIPK participates is the H-abstraction reaction from the fuel by HO2. Discussions are provided on the validity of the DIPK model in comparison with the parametric engine data over a range of temperature, pressure, equivalence ratio, and engine speed.
Publication Date
1-15-2016
Publication Title
Fuel
Volume
164
Number of Pages
141-150
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1016/j.fuel.2015.09.063
Copyright Status
Unknown
Socpus ID
84944345868 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84944345868
STARS Citation
Barari, Ghazal; Sarathy, S. Mani; and Vasu, Subith S., "Improved Combustion Kinetic Model And Hcci Engine Simulations Of Di-Isopropyl Ketone Ignition" (2016). Scopus Export 2015-2019. 2688.
https://stars.library.ucf.edu/scopus2015/2688