Computationally efficient evaluation of optimum homogeneous charge compression ignition operating range with accelerated multizone engine cycle simulation

Garcia-Guendulain, Juan Manuel; Ramirez-Barron, Alejandro; Riesco-Ávila, J.M.; Whitesides, Russell; Aceves, Salvador M.

doi:10.1177/1468087420929488

Cited by 5 publications

(7 citation statements)

References 45 publications

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“…Since the pressure is uniform, the mass that crosses the zonal boundaries is calculated using the ideal gas law. Instead, the Lagrangian model [33][34][35][36][37][38][39] is developed on a control mass basis (each zone has a specified constant mass) and no information is given on zone's position inside the combustion chamber. Here, the ideal gas law allows the computation of the zonal volume.…”

Section: Methodsmentioning

confidence: 99%

“…Either two zone, the core and the boundary layer [24]) or many zones (up to thirty [25]) can be specified. The multi-zone schematization improves the prediction capabilities since it allows to compute a temperature gradient between the zones, ensuring a progressive ignition of the charge [26][27][28][29][30][31][32][33][34][35][36][37][38][39]49]. It is known that the thermal stratification before ignition is primarily developed by heat loss to the cylinder walls, with little contribution from mixing with internal residuals [35].…”

Section: Introductionmentioning

confidence: 99%

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Development of a 0D multi-zone model for fast and accurate prediction of homogeneous charge compression ignition (HCCI) engine

et al. 2021

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Homogeneous Charge Compression Ignition (HCCI) is a promising advanced combustion mode, featured by both high thermal efficiency and low emissions. In this context, a 0D multi-zone model has been developed, where the thermal stratification in the combustion chamber has been taken into account. The model is based on a control mass Lagrangian multi-zone approach. In addition, a procedure based on a tabulated approach (Tabulated Kinetic of Ignition - TKI) has been developed, to perform an accurate and fast prediction of the air/fuel mixture auto-ignition. This methodology allows combining the accuracy of detailed chemistry with a negligible computational effort. The tabulated procedure has been preliminarily verified through the comparison with the results of a commercial software (GT-Power™). In this assessment, single zone simulations have been performed comparing the TKI strategy to a conventional chemical kinetics one, in four different cases at varying the intake temperature and the equivalence ratio. Then, the proposed 0D multi-zone model has been validated against experimental data available in the literature. The analyses are carried out with reference to an HCCI engine fuelled with pure hydrogen and working in a single operating point, namely 1500 rpm, 2.2 bar IMEP and with a fuel/air equivalence ratio of 0.24. Three different temperatures, i.e., 373, 383, and 393 K, have been considered for the intake air. The experimental/numerical comparisons of pressure cycles and burn rates proved that the proposed numerical approach can reproduce the experiments with good accuracy, without the need for case-by-case tuning.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a 0D multi-zone model for fast and accurate prediction of homogeneous charge compression ignition (HCCI) engine

et al. 2021

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“…The start of combustion (SOC) is controlled primarily by the fuel chemical kinetics, which, in turn, depends upon the evolution of the in-cylinder pressure and the temperature history. 64,65 Thus, precise control is difficult to achieve over a wide range of engine speeds and loads. The intake air temperature, exhaust gas recirculation amount, and utilizing fuel blends with optimal reactivity are indirect controllers of SOC and combustion rate in HCCI.…”

Section: Types Of Diesel Ltc Strategymentioning

confidence: 99%

Prospective fuels for diesel low temperature combustion engine applications: A critical review

Krishnasamy

Gupta

Reitz

2020

International Journal of Engine Research

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Low Temperature Combustion (LTC) strategies are most promising to simultaneously reduce oxides of nitrogen (NOx) and soot emissions from diesel engines along with offering higher thermal efficiency. Commercial wide spread implementation of diesel LTC strategies requires several challenges to be addressed, including lack of precise ignition timing control, widening the narrow operating load ranges and reducing high unburned fuel emissions. These challenges can be addressed through modifications in the engine or fuel design or both. The timing and rate of combustion in several LTC strategies are controlled primarily by the chemical kinetics of the fuel. Since, diesel fuel reactivity and volatility are tailor-made to perform well under conventional diesel combustion conditions, its application in LTC poses several problems, as highlighted in this paper. Hence, it is important to identify suitable alternative fuels for the different diesel LTC strategies. The published literature on LTC over the past 25 years is critically analyzed to discuss the evolution of the different diesel LTC strategies, their operability limits, the challenges and the controlling parameters for each strategy. This is followed by in-depth analysis of the role of the fuel and the fuel requirements for each strategy. Further, the importance of adopting a hybrid surrogate modeling approach to enable numerical simulation of diesel LTC is highlighted. A novel attempt of relating various diesel low temperature combustion (LTC) strategies based on the approach followed to achieve positive ignition dwell through different injection strategies, utilizing high exhaust gas recirculation (EGR), and dual fuels is presented. The need for replacing diesel with alternative liquid fuels in LTC strategies is presented by highlighting the fundamental problems associated with diesel fuel characteristics. The review concludes by suggesting potential alternative fuels for various diesel LTC strategies and provides directions for future work to address the challenges facing compression ignition LTC operation.

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“…For instance, re-induction can be achieved by reopening the exhaust valve during the intake stroke, hence some of the exhaust gas is reinducted into the cylinder along with the fresh charge. 24,26,27 On the other hand, early closing of the exhaust valve and late opening of the intake valve, also known as negative valve overlap (NVO) [28][29][30][31][32][33] leads to retention of burned charge inside the cylinder. Stability analysis is conducted based on an HCCI engine with high dilution reinducted by a second opening of the exhaust valve during the intake stroke.…”

Section: Introductionmentioning

confidence: 99%

Physics-based modeling of homogeneous charge compression ignition engines with exhaust throttling

Chiang

Singh

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Homogeneous charge compression ignition (HCCI) engines create a more efficient power source for either stationary power generators or automotive applications. Due to the absence of direct actuation of ignition, HCCI based combustion control is quite challenging. For the purpose of control synthesis and design, a crank-angle based dynamic model of an HCCI engine with internal exhaust gas recirculation (EGR) is proposed in this paper. The HCCI autoignition timing is controlled by the amount of internal EGR induced by the cost effective exhaust throttling strategy. The zero dimensional single zone model is developed based on conservation of mass and energy and ideal gas law. The model is comprised of five subsystems: cylinder volume, intake, and exhaust runners along with combustion and heat-transfer models. Inputs to the model include engine speed, intake temperature, fueling rate, intake, and exhaust throttle positions. Outputs of the model contain the pressure, temperature, mass and burned gas fraction in the intake, exhaust and cylinder, air-to-fuel ratio (AFR), heat release rate, combustion phasing, and the indicated mean effective pressure (IMEP). The model is developed based on MATLAB/Simulink and validated against experimental data under steady-state and transient conditions at various intake temperatures, fueling levels, and exhaust throttle positions. Results demonstrate that by changing the exhaust throttle position, the pressure in the exhaust runner is regulated. As a result, the residual gas fraction is altered, leading to changes in mixture temperature and thus control of the HCCI combustion phasing. In the end, closed loop simulation is conducted with a linear quadratic Gaussian (LQG) controller applied to the crank-angle based model for regulation of combustion timing CA50 using exhaust throttle during load (fueling level) changes. In the future, this model can be utilized for control development and hardware in the loop (HIL) simulation.

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Computationally efficient evaluation of optimum homogeneous charge compression ignition operating range with accelerated multizone engine cycle simulation

Cited by 5 publications

References 45 publications

Development of a 0D multi-zone model for fast and accurate prediction of homogeneous charge compression ignition (HCCI) engine

Development of a 0D multi-zone model for fast and accurate prediction of homogeneous charge compression ignition (HCCI) engine

Prospective fuels for diesel low temperature combustion engine applications: A critical review

Physics-based modeling of homogeneous charge compression ignition engines with exhaust throttling

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