Thermally stratified compression ignition enabled by wet ethanol with a split injection strategy: A CFD simulation study

Mozhgan Rahimi Boldaji, Brian Gainey and Benjamin Lawler

Applied Energy, 2019, vol. 235, issue C, 813-826

Abstract: The potential application of partially distilled alcohol biofuels in a new, advanced, low temperature combustion (LTC) concept called Thermally Stratified Compression Ignition (TSCI) was studied in this work. TSCI, which was recently conceived, attempts to intentionally stratify the temperature distribution in the cylinder prior to ignition in a lean, premixed, compression-ignited combustion mode. Preliminary experiments used the latent heat of vaporization from the direct injection of water to stratify the temperatures prior to ignition and therefore provide control over the start and rate of combustion in LTC and expand the operating range. While these preliminary results are very encouraging, the requirement of a separate direct injector for water somewhat limits the commercial applications of this variant of TSCI (i.e. employing direct water injection). Instead, this work investigates using the latent heat of vaporization of wet ethanol to introduce the forced thermal stratification of TSCI to control the combustion process.

Keywords: Advanced combustion; TSCI; LTC; Heat release; Thermal stratification; Wet ethanol; Split injection strategy (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (6)

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DOI: 10.1016/j.apenergy.2018.11.009

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