An experimental investigation of flame lift-off length and soot luminosity of the emulsified diesel under various ambient temperatures

Ming Huo, Karthik Nithyanandan, Chia Fon F. Lee, Nan Zhou, Han Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The emulsified fuel remains attractive due to its potential capability of reducing the NOx and particular matter (PM) at the same time. In this work, the emulsified diesel, with the amount of water quantities ranged between 10% and 20% by volume, was injected and combusted in an optical constant volume chamber. With controlled combustion of acetylene mixture prior to the fuel injection, the chamber is able to provide high ambient temperature and pressure to mimic the real engine operation. In this study, ambient temperatures ranging from 800K to 1200K were investigated. Mie scattering images, at 15000 fps, were first taken to record the evolution of the spray using a Phantom 7.1 high speed camera coupled with a copper vapor laser as the light source. The spray images revealed longer liquid penetration and wider cone angle at the beginning stage of the injection event for emulsified fuel, supporting the occurrence of micro-explosion. Ambient temperature played an important role in the dynamic behavior of soot lift-off length as low ambient temperature features a long initial soot lift-off length and sharp decrease afterwards for both fuels while high ambient temperature enables the soot lift-off to achieve quasisteady state immediately after the onset of the fuel injection. The broadband luminosity results indicate the advantage of using emulsified fuel to suppress soot formation, and this benefit can be maximized if coupled with a low temperature combustion strategy.

Original languageEnglish (US)
Title of host publicationFuels; Numerical Simulation; Engine Design, Lubrication, and Applications
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791856109
DOIs
StatePublished - Jan 1 2013
EventASME 2013 Internal Combustion Engine Division Fall Technical Conference, ICEF 2013 - Dearborn, MI, United States
Duration: Oct 13 2013Oct 16 2013

Publication series

NameASME 2013 Internal Combustion Engine Division Fall Technical Conference, ICEF 2013
Volume2

Other

OtherASME 2013 Internal Combustion Engine Division Fall Technical Conference, ICEF 2013
Country/TerritoryUnited States
CityDearborn, MI
Period10/13/1310/16/13

ASJC Scopus subject areas

  • Automotive Engineering

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