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    Numerical Analysis of the Effects of EGR and Its Constituents on Autoignition Reactivity of DME HCCI Combustion

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    https://www.riss.kr/link?id=A99567037

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    This work was explored various effects of inert gas constituents of exhaust gas recirculation (EGR) on reducing the pressure rise rate by controlling the autoignition reactivity of homogeneous charge compression ignition combustion fueled with DME. CHEMKIN-PRO was used as a solver while Curran"s DME reaction scheme was utilized to understand the function of EGR. At first, influences of EGR and its constituents were shown on reducing the pressure rise rate. Then, to better understand and to elucidate the function of EGR on autoignition reactivity, contribution matrix has been used to extract important reaction paths for heat release from a reaction mechanism. As a result, the high EGR concentration can improve the high-load HCCI combustion robustness through the heat release of H₂O₂ reaction was generated in expansion process.
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    This work was explored various effects of inert gas constituents of exhaust gas recirculation (EGR) on reducing the pressure rise rate by controlling the autoignition reactivity of homogeneous charge compression ignition combustion fueled with DME. CH...

    This work was explored various effects of inert gas constituents of exhaust gas recirculation (EGR) on reducing the pressure rise rate by controlling the autoignition reactivity of homogeneous charge compression ignition combustion fueled with DME. CHEMKIN-PRO was used as a solver while Curran"s DME reaction scheme was utilized to understand the function of EGR. At first, influences of EGR and its constituents were shown on reducing the pressure rise rate. Then, to better understand and to elucidate the function of EGR on autoignition reactivity, contribution matrix has been used to extract important reaction paths for heat release from a reaction mechanism. As a result, the high EGR concentration can improve the high-load HCCI combustion robustness through the heat release of H₂O₂ reaction was generated in expansion process.

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    목차 (Table of Contents)

    • Abstract
    • 1. INTRODUCTION
    • 2. COMPUTATIONAL APPROACH
    • 3. RESULTS
    • 4. CONCLUSION
    • Abstract
    • 1. INTRODUCTION
    • 2. COMPUTATIONAL APPROACH
    • 3. RESULTS
    • 4. CONCLUSION
    • References
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