A Combustion Correlation for Diesel Engine Simulation

Watson, N.; Pilley, A.D.; Marzouk, Mohamed

doi:10.4271/800029

Cited by 263 publications

(118 citation statements)

References 4 publications

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“…The model presented in [19] points out that ignition delay depends on in-cylinder temperature and pressure, engine speed and accumulated fuel amount and may be calculated in degrees and in milliseconds with the following expressions: Other models based on experimental data suggest correlations that use an Arrhenius expression similar to that proposed in [15], in which the constants estimated by [39] …”

Section: Ignition Delay Modelmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamic Study of the Working Cycle of a Direct Injection Compression Ignition Engine

Fygueroa¹,

Villamar²,

Fygueroa³

2012

Internal Combustion Engines

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Section: Ignition Delay Modelmentioning

confidence: 99%

“…Heat released during each phase is evaluated by the empirical expressions proposed in [39] and [40]. Equations proposed in [39] …”

Section: Burning Factormentioning

confidence: 99%

Thermodynamic Study of the Working Cycle of a Direct Injection Compression Ignition Engine

Fygueroa¹,

Villamar²,

Fygueroa³

2012

Internal Combustion Engines

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“…Particularly as regards multi-zone modeling, detailed submodels for spray penetration, droplet evaporation, air-fuel mixing etc are also taken into account. The universally accepted premixed-diffusion combustion models are usually applied in the form of simple Wiebe functions [129], or using its alternative and more complex version of Watson [130] or Woschni-Anisits [131], or the more fundamental Whitehouse-Way approach [132], or in the form of Arrhenius equations in multi-zone models. Great care has to be taken, in this case, for modifications needed in order to take into account the peculiarities of transient combustion, which the steady-state modeling cannot predict.…”

Section: Combustionmentioning

confidence: 99%

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Rakopoulos¹,

Giakoumis²

2006

SAE Technical Paper Series

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Study and modeling of transient operation is an important scientific objective. This is due to the fact that the majority of daily vehicle driving conditions involve transient operation, with non-linear situations experienced during engine transients. Thus, proper interconnection is needed between engine, governor, fuel pump, turbocharger and load. This paper surveys the publications available in the open literature concerning diesel engine simulations under transient operating conditions. Only those models that include both full engine thermodynamic calculations and dynamic powertrain modeling are taken into account, excluding those that focus on control design and optimization. Most of the attention is concentrated to the simulations that follow the filling and emptying modeling approach. A historical overview is given covering, in more detail, research groups with continuous and consistent study of transient operation. One of the main purposes of this paper is to summarize basic equations and modeling aspects concerning in-cylinder calculations, friction, turbocharger, engine dynamics, governor, fuel pump operation, and exhaust emissions during transients. The various limitations of the models are discussed together with the main aspects of transient operation (e.g. turbocharger lag, combustion and friction deterioration), which diversify it from the steady-state. Some of the most important findings in the field during the last 30 years are presented and discussed. The survey extends to special cases of transient diesel engine simulation, such as second-law analysis, response when the turbocharger compressor experiences surge, and whole vehicle performance. Several methods of improving transient response are also mentioned, based on the various simulations. An easy-to-read tabulation of all research groups dealing with the subject, that includes details about each model developed and engines/parameters studied, is also provided at the end of the paper.

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“…This submission will discuss one approach of indirectly determining this key combustion parameter. employed within various engine cycle simulation computer codes (Watson, 1977;Watson et al, 1980;Ghojel, 1982;Miyamota et al, 1985;Craddock and Hussain, 1986;Breuer, 1995;Reddy et al, 1996) such as Transeng, GT-Power and Wave. Such correlations include a number of constants (up to six) that are not always a direct function of the engine system, i.e.…”

Section: Introductionmentioning

confidence: 99%

Determination of Laminar Flame Speed of Diesel Fuel for Use in a Turbulent Flame Spread Premixed Combustion Model

Schihl¹,

Tasdemir²,

Bryzik³

2006

Transformational Science and Technology for the Current and Future Force

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One of the key challenges facing diesel engine system modelers lies in adequately predicting the fuel burning rate profile given the direct relationship between energy release and key performance parameters such as fuel economy, torque, and exhaust emissions. Current state-of-the-art combustion sub-models employed in such system simulation codes rely heavily on empiricism and successful application of such sub-models for new engine designs is highly dependent on past experience with similar combustion systems. One common approach to address this issue is to expend great effort choosing associated empirical coefficients over a range of similar combustion system designs thus improving the potential predictive capability of a given empirical model. But, continual combustion system development and design changes limit the extrapolation and application of such generic combustion system dependent coefficients to new designs due to various reasons including advancements in fuel injection systems, engine control strategy encompassing multiple injections, and combustion chamber geometry.In order to address these very difficult challenges, an extensive effort has been applied toward developing a physically based, simplified combustion model for military-relevant diesel engines known as the Large Scale Combustion Model (LSCM). Recent effort has been spent further refining the first stage of the LSCM two stage combustion model that is known as the premixed phase sub-model. This particular sub-model has been compared with high-speed cylinder pressure data acquired from two relevant direct injection diesel engines with much success based on a user defined parameter referred to as the laminar flame speed by the combustion community. It is a physically significant parameter that is highly dependent on local temperature, pressure, and oxygen concentration but little experimental effort has been spent determining its behavior for diesel fuel due to ignition constraints. This submission will discuss one approach of indirectly determining this key combustion parameter.

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A Combustion Correlation for Diesel Engine Simulation

Cited by 263 publications

References 4 publications

Thermodynamic Study of the Working Cycle of a Direct Injection Compression Ignition Engine

Thermodynamic Study of the Working Cycle of a Direct Injection Compression Ignition Engine

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Determination of Laminar Flame Speed of Diesel Fuel for Use in a Turbulent Flame Spread Premixed Combustion Model

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