Three-dimensional computer analysis of flow and combustion in automotive internal combustion engines

Markatos, N.C.; Mukerjee, T.

doi:10.1016/0378-4754(81)90022-7

Cited by 24 publications

(3 citation statements)

References 10 publications

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“…The results presented below are for case 2, Swirl velocity is plotted at depths (l), (2) and (3): 64, 12.7 and 24.32 mm below the piston crown respectively.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

On variable grids for modelling flow in reciprocating engines

Shah

Markatos

Glynn³

1988

Numerical Methods in Fluids

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SUMMARYThe moving boundary (i.e. the piston) within a reciprocating engine poses the problem that as it moves towards the cylinder head it compresses the computational grid lines. Control cells that started with reasonable aspect ratios become so compressed that aspect ratios of loo0 are not unusual in some cases. This, of course, adversely affects numerical accuracy and convergence. It is the purpose of this paper to present a conservative scheme that allows for the removal and addition of grid cells, during simulation, so as to restore reasonable aspect ratios. Results of the computations are presented and compared with experimental data. It is concluded that with the proposed scheme convergence is obtained within fewer iterations, CPU time is reduced and the results are generally in better agreement with experimental data.

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“…The results presented below are for case 2, Swirl velocity is plotted at depths (l), (2) and (3): 64, 12.7 and 24.32 mm below the piston crown respectively.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

On variable grids for modelling flow in reciprocating engines

Shah

Markatos

Glynn³

1988

Numerical Methods in Fluids

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“…It is recognized by many studies that the combustor is the least efficient system in power plants (Markatos and Mukerjee 1981;Shah and Markatos 1987;Stanciu et al 2007;Khaldi and Adouane 2011). In order to improve the efficiency of the combustion system, it is necessary to identity the physical and chemical mechanisms responsible for thermodynamic irreversibilities.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation Optimization in Internal Combustion Engine

2015

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In this work, we present a computational investigation of the thermodynamic irreversibilities generated by the combustion process in a cylindrical combustor. The calculations of the turbulent non-premixed combustion properties are based on the aerothermochemical equations. The simulation considers the contribution of each mechanism in the entropy generation sources, i.e., friction, heat conduction, species diffusion and chemical reaction. The computations were carried out by the Fluent-CFD software package. The results show that the chemical reaction and the heat conduction are the major sources of entropy production. Moreover, the fuel preheating reduces significantly thermodynamic irreversibilities in the combustion chamber, while the air factor has a negative effect.

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“…Η αίθουσα έχει διαστάσεις: 9 m στη χ-διεύθυνση, 11 m στη y-διεύθυνση και 12 m στη z-διεύθυνση, δηλαδή 9m χ lim χ 12m (Ι χ h χ w). Οι θέσεις των θεατών του αμφιθεάτρου καθώς και οι ίδιοι οι θεατές μοντελοποιούνται χρησιμοποιώντας την θεώρηση του «κενού χώρου» (porosity), (Markatos and Mukerjee, 1981). Σύμφωνα με αυτή την θεώρηση, κάθε κελί του πλέγματος χαρακτηρίζεται από μία ομάδα κλασμάτων.…”

Section: γεωμετρικα χαρακτηρισίίκα του πεδιουunclassified

Χρήση Υπολογιστικών Μεθόδων Για Το Σχεδιασμό Χώρων Και Εγκαταστάσεων Με Κτιρήρια Ποιότητας Εσωτερικού Αέρα Και Θερμικής Άνεσης

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Three-dimensional computer analysis of flow and combustion in automotive internal combustion engines

Cited by 24 publications

References 10 publications

On variable grids for modelling flow in reciprocating engines

On variable grids for modelling flow in reciprocating engines

Entropy Generation Optimization in Internal Combustion Engine

Χρήση Υπολογιστικών Μεθόδων Για Το Σχεδιασμό Χώρων Και Εγκαταστάσεων Με Κτιρήρια Ποιότητας Εσωτερικού Αέρα Και Θερμικής Άνεσης

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