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    A computational study of pre-ignition to detonation transition in a one-dimensional chamber

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    Type
    Conference Paper
    Authors
    Sow, Aliou
    Jaasim, Mohammed
    Hernandez Perez, Francisco
    Im, Hong G. cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Clean Combustion Research Center
    Date
    2017-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/666776
    
    Metadata
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    Abstract
    Regulations in CO2 emissions have led to the development of downsized, highly boosted and direct injection technologies that enhance power density and fuel consumption in Spark Ignition (SI) engines. Despite these enhancements, SI engines are prone to exhibit uncontrolled pre-ignition, whose occurrence, specially at low speed and high load, can trigger detonation development which is associated to violent peak pressures and pressure oscillations that can damage the engine. The uncontrolled combustion is a major challenge to overcome for the new generation of SI engines to be widely used. Here, we studied detonation development using high resolution direct numerical simulations of a closed one-dimensional combustion chamber. A highly reactive hydrogen-oxygen mixture with a detailed chemical reaction mechanism is used in this study. Unlike previous studies where bulk mixture properties were arbitrarily defined, we used results from engine simulations obtained with the CONVERGE software to set the initial bulk mixture properties. Depending on the initial conditions two different paths to detonation development were identified: 1) auto-ignition near the wall followed by detonation combustion and 2) transition of the initial propagating flame to detonation combustion mode through flame acceleration.
    Sponsors
    The work presented in this paper was sponsored by KAUST and Saudi Aramco under the FUELCOM II Project. The computational work utilized resources from the KAUST Supercomputing Laboratory.
    Publisher
    Combustion Institute
    Conference/Event name
    11th Asia-Pacific Conference on Combustion, ASPACC 2017
    Additional Links
    https://research.kaust.edu.sa/en/publications/a-computational-study-of-pre-ignition-to-detonation-transition-in
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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