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Flash boiling spray of diesel fuel mixed with ethane and its effects on premixed diesel combustion

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Title: Flash boiling spray of diesel fuel mixed with ethane and its effects on premixed diesel combustion
Authors: Kobashi, Y. Browse this author
Hirako, S. Browse this author
Matsumoto, A. Browse this author
Naganuma, K. Browse this author
Keywords: Flash boiling
Premixed diesel combustion
Mixed fuel
Issue Date: 1-Feb-2019
Publisher: Elsevier
Journal Title: Fuel
Volume: 237
Start Page: 686
End Page: 693
Publisher DOI: 10.1016/j.fuel.2018.10.042
Abstract: Mixtures of gaseous and liquid fuels have the potential to induce flash boiling under in-cylinder conditions close to the top dead center, something that can be expected to be suitable for a premixed diesel combustion that demands a way to enhance lean mixture formation. The present study mixes ethane, which is a natural gas component, into diesel fuel as ethane has a high vapor pressure that facilitates flash boiling and as ethane has a low cetane number that prolongs the ignition delay. This paper investigates spray characteristics of a diesel fuel-Ethane mixture, and the engine performance and exhaust emissions are evaluated in a single cylinder engine. The test results show that the flash boiling enhances the lean mixture formation, and realizes combustion with low soot and low NOx without EGR (exhaust gas recirculation) while also improving thermal efficiency. An additional test was performed to identify the effects of the flash boiling and the ignition delay, and the results show that the long ignition delay plays the most important role in the thermal efficiency and emission changes and that the flash boiling facilitates the formation of leaner mixtures that lower the overall combustion rate and achieves very low NOx emissions.
Rights: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小橋 好充

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