Abstract A TP (Temperature Phase) model is presented to carry out optimization calculation for a high-pressure common rail diesel engine. Temperature is the most important parameter in the TP model. For the lower branch (when temperature T < 850 K) of the S-shaped curve (auto-ignition phase), a 6-step ad-hoc model with adjusted rate constants of nheptane is used, referred to steady state assumption. Steady state assumption is based on the observation that, due to very fast chemical processes in combustion problems, many chemical species and reactions are in a quasi-steady state or partial equilibrium. When a species is assumed to be in the steady state, the corresponding differential equation can be replaced by an algebraic relation, which reduces the computational costs. For the middle branch (850 K ≤ T < 1100 K) of the S-shaped curve, a 4-step model is used to calculate the unstable phase. For the upper branch (T ≥ 1100 K) of the S-shaped curve, onestep model is used because the one-step model has widely been used in descriptions of flame stability where it essentially serves as a model that produces a thin flame with strong temperature sensitivity. When zone temperature T < 1500 K, only the soot precursors -PAHs (Polycyclic aromatic hydrocarbons) is created and there is no soot emission. When zone temperature T ≥ 1500 K, PAHs and soot source terms (particle inception, surface growth, oxidation, coagulation) are calculated. The TP model is then applied in multidimensional simulations to carry out optimizing, which reduces experiment cost. The results of cylinder pressures, the corresponding heat release rates, NOx and soot with variation of injection time at constant rail pressure, variation of EGR-rate at constant rail pressure and variation of rail pressure at constant EGR-rate between simulation and experimental data are analyzed. The results indicate that the TP model can carry out optimization and CFD (computational fluid dynamics) and can be a tool to calculate for a high-pressure common rail diesel engine.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Optimization research for a high pressure common rail diesel engine based on simulation


    Beteiligte:
    Liu, Y. (Autor:in) / Zhang, Y. -T. (Autor:in) / Qiu, T. (Autor:in) / Ding, X. (Autor:in) / Xiong, Q. (Autor:in)


    Erscheinungsdatum :

    2010




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Klassifikation :

    BKL:    55.20$jStraßenfahrzeugtechnik / 55.20 Straßenfahrzeugtechnik



    Optimization research for a high pressure common rail diesel engine based on simulation

    Liu, Y. / Zhang, Y. -T. / Qiu, T. et al. | Springer Verlag | 2010


    Optimization research for a high pressure common rail diesel engine based on simulation

    Liu, Y. / Zhang, Y. T. / Qiu, T. et al. | British Library Online Contents | 2010


    Advanced optimization of common-rail diesel engine combustion

    Phillip,C. / Schneemann,A. / Willmann,M. et al. | Kraftfahrwesen | 2001


    Numerical simulation of common rail d.i. diesel engine

    Beatrice, C. / Bertoli, C. / na Migliaccio, M. et al. | SAE Technical Papers | 1999


    Simulation Study on the Process of Pressure Wave Propagation for High-Pressure Common Rail Diesel Engine

    Xu, Chunlong / Li, Guoxiu / Tian, Lili et al. | SAE Technical Papers | 2020