The demand of game-changing technologies to improve efficiency and abate emissions of heavy-duty trucks and off-road vehicles promoted the development of novel engine concepts. The Recuperated Split-Cycle (R-SC) engine allows to recover the exhaust gases energy into the air intake by separating the compression and combustion stages into two different but connected cylinders: the compressor and expander, respectively. The result is a potential increase of the engine thermal efficiency. Accordingly, the 3D-computational fluid dynamics (CFD) modelling of the gas exchange process and the combustion evolution inside the expander becomes essential to control and optimize the R-SC engine concept. This work aims to address the most challenging numerical aspects encountered in a 3D numerical simulation of an R-SC engine. First, the impact of both the mesh features and the boundary conditions is evaluated on the transonic conditions of the air, which enters the expander under a wide range of expansion ratios (1.1÷30). Simulations in a 2D axi-symmetric domain allowed to identify the suitable mesh size required for a correct prediction of the engine volumetric efficiency. Afterwards, simulations of fuel-air mixing and combustion clarified the peculiarities of combustion in R-SC engines, where ignition and combustion are strongly affected by the nonconventional in-cylinder charge motions and temperature stratification.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    3D-CFD Modelling of Gas Exchange and Combustion Inside the Expander of a Recuperated Split-Cycle Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Vaghini, Alessandra (Autor:in) / Bennett, Colin (Autor:in) / Sforza, Lorenzo (Autor:in) / Owen, Nick (Autor:in) / Lucchini, Tommaso (Autor:in)

    Kongress:

    16th International Conference on Engines & Vehicles ; 2023



    Erscheinungsdatum :

    2023-08-28




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    3D-CFD Modelling of Gas Exchange and Combustion Inside the Expander of a Recuperated Split-Cycle Engine

    Sforza, Lorenzo / Lucchini, Tommaso / Vaghini, Alessandra et al. | British Library Conference Proceedings | 2023


    The recuperated split-cycle engine as a sustainable heavy-duty solution

    Owen, Nick / Morgan, Robert / Atkins, Andrew | TIBKAT | 2020


    The recuperated split-cycle engine as a sustainable heavy-duty solution

    Owen, Nick / Morgan, Robert / Atkins, Andrew | Springer Verlag | 2020


    The Ultra Low Emissions Potential of the Recuperated Split Cycle Combustion System

    Atkins, Andrew / Lenartowicz, Christopher / Kennaird, David et al. | SAE Technical Papers | 2019


    A Practical Recuperated Split Cycle Engine for Low Emissions and High Efficiency

    Atkins, Andrew / Selvaraj, Anoop / Barnes, David et al. | SAE Technical Papers | 2019