Methods for Determination of Composition and Thermodynamic Properties of Combustion Products for Internal Combustion Engine Calculations

Way, R. J. B.

doi:10.1243/pime_proc_1976_190_073_02

Cited by 58 publications

(38 citation statements)

References 5 publications

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“…This behavior is completely expected considering the proportional dependency of the flame temperature on ambient temperature [37].…”

Section: Effect Of Injection Pressure Ambient Temperature and In-cylsupporting

confidence: 62%

“…Adiabatic flame temperature was also included to compare with soot temperature at each operating point. Thus, adiabatic flame temperature was calculated with the assumption of constant pressure at each step of calculation, adiabatic burning of the stoichiometric fuel/air mixture and considering a conventional chemical equilibrium model, following the scheme proposed by Way [37].…”

Section: Operating Conditionsmentioning

confidence: 99%

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In-cylinder soot radiation heat transfer in direct-injection diesel engines

Benajes

Martín

García

et al. 2015

Energy Conversion and Management

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HIGHLIGHTSOptoelectronic pyrometer provides similar results compared with a conventional method Lower injection pressure results in higher radiation Higher ambient temperature and higher in-cylinder gas density produce higher radiation Larger lift-off length reduces the soot volume fraction and the spectral intensity An increase on swirl number, load and CA50 provide a lower total radiation Lower values of EGR implies a decreased on radiation intensity KEYWORDSSoot; in-cylinder heat transfer; radiation; Optical pyrometer; ABSTRACTThe efficiency and CO 2 are one of the main concerns of automotive manufacturers.There are several strategies under investigation to solve this problem. In the present work, the research effort has been focused on improving knowledge of in-cylinder heat transfer and its impact on engine efficiency. In particular, soot radiation was studied since it can be considered a significant source of the efficiency losses in modern diesel engines. Considering previous studies, the portion of total chemical energy released during combustion lost due to radiation heat transfer varies widely from 0.5 up to 10%, depending on engine parameters and combustion process. Thus, the main objective of this work was to evaluate the amount of energy lost to soot radiation relative to the input fuel chemical energy during the combustion event under different operating conditions in a completely controlled environment provided by an optical engine. Under these simplified conditions, two-color method was applied by using high speed imaging pyrometer with cameras (two dimensional results) and optoelectronic pyrometer (zero dimensional results). Once a detailed comparison between both diagnostics was performed, optoelectronic pyrometer was used to characterize radiant energy losses in a fully instrumented 4-cylinder direct-injection light-duty diesel engine. In particular swirl ratio, EGR and combustion phasing effects on radiation heat transfer were evaluated.

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“…This behavior is completely expected considering the proportional dependency of the flame temperature on ambient temperature [37].…”

Section: Effect Of Injection Pressure Ambient Temperature and In-cylsupporting

confidence: 62%

Section: Operating Conditionsmentioning

confidence: 99%

In-cylinder soot radiation heat transfer in direct-injection diesel engines

Benajes

Martín

García

et al. 2015

Energy Conversion and Management

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show abstract

“…Note that in an internal combustion engine that operates in a set-point, the mass balance of each cylinder forms a cyclic steady state. Therefore, it is assumed that the total mass balance of the ICE is in steady state [12,148,356].…”

Section: Mass Flow and Combustionmentioning

confidence: 99%

Model-based multi-parametric programming strategies towards the integration of design, control and operational optimization

Diangelakis

Pistikopoulos

2017

Computer Aided Chemical Engineering

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“…The analysis involved 12 chemical species and had the objective of studying the NO and CO formations and their concentration behavior under SI engine conditions. The model considered 22 chemical reactions, the same reactions used by Way [8].…”

Section: Procedures and Assumptionsmentioning

confidence: 99%

Chemical Kinetics Analysis of No and Co Formation Based on Thermodynamic Data From an Ethanol-Fueled Engine Computational Model

Lima¹,

Gallo²

2017

Blucher Engineering Proceedings

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A series of theoretical analyses of pollutant formation has been undertaken on a computer program based on temperature and volume data from a two-zone internal combustion engine model. The objective was to predict the formation of nitric oxide and carbon monoxide during combustion process in an ethanol-fueled engine before the three-way catalyst operation. The predictions were based on a chemical kinetics model, which considered 12 chemical species and 22 chemical reactions. The model calculated the reaction rates from the beginning of the combustion process until chemical kinetics calculations showed no effect on the gases composition during expansion. The developed analysis tested some temperatures in order to discover until when chemical kinetics effectiveness was considerable. This analysis involved the study of NO and CO formation rates. The considered range of temperatures was between 2500 and 1500K, typical engine temperatures during combustion and expansion processes. Results showed that NO and CO formation were qualitatively coherent when compared to known formation measures by ICEs presented on literature. The studied temperatures allow the possibility of maintaining constant the concentration of some species from specific moments during expansion process, without changing significantly formation results.

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Methods for Determination of Composition and Thermodynamic Properties of Combustion Products for Internal Combustion Engine Calculations

Cited by 58 publications

References 5 publications

In-cylinder soot radiation heat transfer in direct-injection diesel engines

In-cylinder soot radiation heat transfer in direct-injection diesel engines

Model-based multi-parametric programming strategies towards the integration of design, control and operational optimization

Chemical Kinetics Analysis of No and Co Formation Based on Thermodynamic Data From an Ethanol-Fueled Engine Computational Model

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