Modeling of emissions from HCCI engines using a consistent 3-zone model with applications to validation of reduced chemistry

Chin, Gregory T.; Chen, Jyh-Yuan

doi:10.1016/j.proci.2010.06.079

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…In order to deal with this limitation, a number of engine modeling approaches have been developed that-while avoiding the cost of a spatially resolved, multidimensional computational fluid dynamics simulation-consider multiple zones to represent different regions within an engine (e.g., core, piston crevice, boundary layer) [41][42][43][44][45]. While these multi-zone models can more closely match experimental results, particularly for heat release rate, peak pressure, and unburned hydrocarbon emissions, the single-zone model adequately predicts the point of ignition as a function of inlet properties [44]. Furthermore, Yelvington et al [12] showed that single-zone calculations could be used to accurately predict knock limits for HCCI combustion.…”

Section: Caveats and Limitationsmentioning

confidence: 99%

A novel fuel performance index for low-temperature combustion engines based on operating envelopes in light-duty driving cycle simulations

Daly¹,

Cannella²,

Hagen³

2016

Preprint

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A c c e p t e d M a n u s c r i p t N o t C o p y e d i t e dUnfortunately, traditional ratings such as octane number poorly predict the autoignition behavior of fuels in such engine modes, and metrics recently proposed for HCCI engines have areas of improvement when wide ranges of fuels are considered. In this study, a new index for ranking fuel suitability for LTC engines was defined, based on the fraction of potential fuel savings achieved in the FTP-75 light-duty vehicle driving cycle. Driving cycle simulations were performed using a typical light-duty passenger vehicle, providing pairs of engine speed and load points. Separately, single-zone naturally aspirated HCCI engine simulations were performed for a variety of fuels in order to determine the operating envelopes for each. These results were combined to determine the varying improvement in fuel economy offered by fuels, forming the basis for a fuel performance index. Results showed that, in general, lower octane fuels performed better, resulting in higher LTC fuel index values; however, octane number alone did not predict fuel performance.

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Section: Caveats and Limitationsmentioning

confidence: 99%

A novel fuel performance index for low-temperature combustion engines based on operating envelopes in light-duty driving cycle simulations

Daly¹,

Cannella²,

Hagen³

2016

Preprint

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show abstract

“…Unburned crevice gases, which are compressed into the crevices during the compression stroke, flowed back into the combustion chamber during the expansion stroke and accounted for unburned hydrocarbons [20]. Intake and exhaust flows were modeled using measured valve lifts with mass flow computed using a discharge coefficient of C d = 0.6.…”

Section: Engine Modelingmentioning

confidence: 99%

Working fluid composition effects on methane oxycombustion in an SI-engine: EGR vs. CO2

Blarigan

Seiser

Chen

et al. 2013

Proceedings of the Combustion Institute

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“…SOI was adjusted to achieve a CA50 of 3 ± 0.3 CAD for all trials. Although a single-zone model may be insufficient to gather the effects of unburned charge trapped in piston crevices 33 , these emissions trends are enough to encourage further investigation. Figure 22 shows the effect of the amount of H 2 O 2 addition on the HRR at an intake temperature of 460 K and a SOI of -5 CAD.…”

Section: Resultsmentioning

confidence: 99%

Effect of hydrogen peroxide addition to methane fueled homogeneous charge compression ignition engines through numerical simulations

Hammond¹,

Mack²,

Dibble³

2017

Preprint

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The effect of the direct injection of hydrogen peroxide into a port-injected methane fueled homogeneous charge compression ignition engine was investigated numerically. The injection of aqueous hydrogen peroxide was implemented as a means of combustion phasing control. A single cylinder homogeneous charge compression ignition engine (2.43 L Caterpillar) was modeled using the Cantera 2.0 flame code toolkit, the GRI-Mech 3.0 chemical reaction mechanism, and a single-zone slider-crank engine model. Start of injection timing and the amount of injected hydrogen peroxide were manipulated to achieve desired combustion phasing under a wide range of intake temperatures. As the concentration of hydrogen peroxide is increased, the combustion phasing is advanced up to 22 degrees for the conditions investigated in this study. This advancing effect is most pronounced at small concentrations (< 10 g H2O2 / kg CH4) and early injection timings (SOI < 25 degrees BTDC). The model suggests hydrogen peroxide can be introduced as a means of combustion phasing control while maintaining the low emissions and peak in-cylinder pressures inherent in homogeneous charge compression ignition engines.

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Modeling of emissions from HCCI engines using a consistent 3-zone model with applications to validation of reduced chemistry

Cited by 9 publications

References 12 publications

A novel fuel performance index for low-temperature combustion engines based on operating envelopes in light-duty driving cycle simulations

A novel fuel performance index for low-temperature combustion engines based on operating envelopes in light-duty driving cycle simulations

Working fluid composition effects on methane oxycombustion in an SI-engine: EGR vs. CO2

Effect of hydrogen peroxide addition to methane fueled homogeneous charge compression ignition engines through numerical simulations

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