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    Soot characteristics of light naphtha in a constant volume combustion chamber using two-color pyrometry

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    Type
    Conference Paper
    Authors
    Wu, Zengyang
    Wang, Libing
    Badra, Jihad A.
    Roberts, William L. cc
    Fang, Tiegang
    KAUST Department
    Mechanical Engineering Program
    Clean Combustion Research Center
    Physical Science and Engineering (PSE) Division
    Date
    2018-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/666814
    
    Metadata
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    Abstract
    This study investigates the soot processes of light naphtha (LN) under diesel engine conditions with an outwardly opening piezo gasoline direct injection (GDI) fuel injector. Five ambient oxygen concentrations varying from 10% to 21% were selected to simulate both conventional diesel engine operation environment and low oxygen concentration combustion environment. A two-color pyrometry was applied to measure flame temperature and soot concentration (i.e., KL factor) distribution under different ambient conditions. KL factor is a measure of soot particulate concentration in which K is a measure of soot number density, and L is a measure of the path length along which the measurement is made. It is found that flame temperature ranges from 1500K to 2300K under selected conditions. A higher oxygen concentration could accelerate fuel combustion rate. High temperature areas are mainly located at the center or downstream of the flame. Flame upstream always has lower temperature than other regions. High KL factors are observed at flame periphery where flame temperature is lower than 1800K and has rapid temperature variation. Accumulated KL factor was calculated to evaluate overall soot amount. The lowest accumulated KL factors are observed at 1000 K ambient temperature condition when the ambient oxygen concentration is 21%.
    Publisher
    Eastern States Section of the Combustion Institute
    Conference/Event name
    2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018
    Additional Links
    https://research.kaust.edu.sa/en/publications/soot-characteristics-of-light-naphtha-in-a-constant-volume-combus
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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