Influence of Injection Timing and Piston Bowl Geometry on PCCI Combustion and Emissions

Cao, Li; Bhave, Amit; Su, Haiyun; Mosbach, Sebastian; Kraft, Markus; Dris, Antonis; McDavid, Robert M.

doi:10.4271/2009-01-1102

Cited by 52 publications

(27 citation statements)

References 29 publications

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“…The model was developed in the late 1990s for modelling NO x formation in homogeneous charge compression ignition (HCCI) engines with very low computational cost [13,14]. Later on it was extended to take account of the mixture inhomogeneity [15][16][17][18][19][20][21][22][23][24]. Barths et al [23] and Felsch et al [24] described a two-waycoupling of three-dimensional CFD code and a zero-dimensional reactor code based on detailed chemistry to model HCCI combustion with fuel inhomogeneity.…”

Section: Introductionmentioning

confidence: 98%

Multidimensional chemistry coordinate mapping approach for combustion modelling with finite-rate chemistry

Jangi

Bai

2012

Combustion Theory and Modelling

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A multidimensional chemistry coordinate mapping (CCM) approach is presented for efficient integration of chemical kinetics in numerical simulations of turbulent reactive flows. In CCM the flow transport is integrated in the computational cells in physical space, whereas the integration chemical reactions are carried out in a phase space made up of a few principal variables. Each cell in the phase space corresponds to several computational cells in the physical space, resulting in a speedup of the numerical integration. In reactive flows with small hydrocarbon fuels two principal variables have been shown to be satisfactory to construct the phase space. The two principal variables are the temperature (T ) and the specific element mass ratio of the H atom (J H ). A third principal variable, σ = ∇J H · ∇J H , which is related to the dissipation rate of J H , is required to construct the phase space for combustion processes with an initially nonpremixed mixture. For complex higher hydrocarbon fuels, e.g. n-heptane, care has to be taken in selecting the phase space in order to model the low-temperature chemistry and ignition process. In this article, a multidimensional CCM algorithm is described for a systematic selection of the principal variables. The method is evaluated by simulating a laminar partially remixed pre-vaporised n-heptane jet ignition process. The CCM approach is then extended to simulate n-heptane spray combustion by coupling the CCM and Reynolds averaged Navier-Stokes (RANS) code. It is shown that the computational time for the integration of chemical reactions can be reduced to only 3-7%, while the result from the CCM method is identical to that of direct integration of the chemistry in the computational cells.

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Section: Introductionmentioning

confidence: 98%

Multidimensional chemistry coordinate mapping approach for combustion modelling with finite-rate chemistry

Jangi

Bai

2012

Combustion Theory and Modelling

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“…Stochastic reactor models enable characterization of in-cylinder stratification but at a reduced computational cost compared to say 3D CFD [30,31], thus enabling easy adoption of advanced fuel oxidation and emissions models in timescales suitable for adoption into standard multi-cycle simulations [32,33]. Fuel oxidation and emissions formation models have received considerable attention and development over the last decade.…”

Section: Engine Cycle Simulationmentioning

confidence: 99%

Simulating combustion in a PCI (premixed compression ignition) engine using DI-SRM and 3 components surrogate model

Ahmedi

Ahmed

Kalghatgi

2015

Combustion and Flame

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“…It also contributes to the formation of pollutants during the engine combustion process. The combination of bowl geometry, swirling, and spray targeting helps reduce emissions and increase the efficiency of fuel consumption [53]. Furthermore, a combustion chamber with a bowl-in-piston configuration has a decreased ratio of areato-volume in engines with only small displacements.…”

Section: Bowl Piston Designmentioning

confidence: 99%

The use of different types of piston in an HCCI engine: A review

Aljaberi¹,

Hairuddin²,

Aziz³

2017

Int. J. Automot. Mech. Eng.

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Homogenous charge compression ignition (HCCI) combines the advantages of spark ignition (SI) and compression ignition (CI) engines to improve fuel consumption and emission levels. HCCI engines have the advantage of relatively higher engine efficiency than SI engines while maintaining lower emissions levels than CI engines. Combustion in HCCI engines occurs spontaneously at any location once the fuel-air mixture reaches its chemical activation energy. Pistons have a major effect on controlling the combustion inside the combustion chamber of an HCCI engine. Many researchers have studied various designs for pistons to improve HCCI engines. The aim of this study is to explore these different types of pistons and their designs in terms of improving the performance of HCCI engines fuelled with gasoline. The most common pistons used in HCCI are twostroke pistons, bowl types, specialised pistons, and dome-shaped pistons; each offers distinct advantages and disadvantages. Software simulation is the latest way of determining the best piston to be used for HCCI engines, as it is more cost effective and less time consuming than experiments. Overall, bowl type pistons offer reduced fuel consumption and a higher load capacity when used in an HCCI engine.

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Influence of Injection Timing and Piston Bowl Geometry on PCCI Combustion and Emissions

Cited by 52 publications

References 29 publications

Multidimensional chemistry coordinate mapping approach for combustion modelling with finite-rate chemistry

Multidimensional chemistry coordinate mapping approach for combustion modelling with finite-rate chemistry

Simulating combustion in a PCI (premixed compression ignition) engine using DI-SRM and 3 components surrogate model

The use of different types of piston in an HCCI engine: A review

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