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    Autoignition studies of Liquefied Natural Gas (LNG) in a shock tube and a rapid compression machine

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    Type
    Article
    Authors
    Vallabhuni, Sonal K.
    Lele, Aditya D.
    Patel, Vaibhav
    Lucassen, Arnas
    Moshammer, Kai
    AlAbbad, Mohammed A. cc
    Farooq, Aamir cc
    Fernandes, Ravi X.
    KAUST Department
    Chemical Kinetics & Laser Sensors Laboratory
    Clean Combustion Research Center
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2018-06-07
    Online Publication Date
    2018-06-07
    Print Publication Date
    2018-11
    Permanent link to this record
    http://hdl.handle.net/10754/628431
    
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    Abstract
    Liquefied Natural Gas (LNG) has become an increasingly important world energy resource and is a part of the European Union clean fuel strategy launched in 2013. Therefore, there are currently several ongoing measurement strategies considering quality specification of LNG. In this context, for application in gas engines, it is essential to understand the combustion behavior of these natural gas mixtures. The methane number (MN) which represents a scale for the knocking propensity, is one of the main indicators for this combustion behavior. In this study, we investigated the influence of the LNG composition on the ignition delay time and thus the knocking behavior of prototypical LNG Mixtures. Several LNG typical mixtures containing CH/CH/CH/n-CH/i-CH/n-CH/i-CH/N were studied in the temperature range 850–1450 K, with pressures of 20 and 40 bar and at equivalence ratios of 0.4 and 1.2. The use of a shock tube and a rapid compression machine facility allowed us to study the ignition behavior over a wide range of operating conditions relevant to gas engines. We report a detailed investigation of LNG autoignition with respect to temperature, pressure and equivalence ratio thereby providing crucial validation data for chemical kinetic models for real applications.
    Citation
    Vallabhuni SK, Lele AD, Patel V, Lucassen A, Moshammer K, et al. (2018) Autoignition studies of Liquefied Natural Gas (LNG) in a shock tube and a rapid compression machine. Fuel 232: 423–430. Available: http://dx.doi.org/10.1016/j.fuel.2018.04.168.
    Sponsors
    This work is part of the EMPRP ENG60 ’Metrological support for LNG custody transfer and transport fuel applications (LNG II)’ and of the EMPIR 16ENG09 ’Metrological support for LNG and LBG as transport fuel (LNG III)’. The EMRP and EMPIR are jointly funded by the participating countries within EURAMET and the European Union. The authors thank Bo Shu for the helpful discussions and his support to this work.
    Publisher
    Elsevier BV
    Journal
    Fuel
    DOI
    10.1016/j.fuel.2018.04.168
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0016236118308238
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.fuel.2018.04.168
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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