Multizone Modeling of a Fumigated Diesel Engine

Ottikkutti, Pradheepram; Gerpen, Jon Van; Cui, Ke Run

doi:10.4271/910076

Cited by 12 publications

(12 citation statements)

References 31 publications

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“…Since NG prices have recently decreased due to the presence of shale gas in the US, NG dual-fuel has also been the subject of increasing interest in road transport. Though the dual fuel concept has traditionally been perceived as natural gas combustion, there are several liquid fuels that have been studied in dual fuel combustion: ethanol [9][10][11][12][13][14][15][16][17], methanol [18][19][20][21][22], butanol [23] Liquefied Petroleum Gas (LPG)/propane [24][25][26] and gasoline [27,28]. A common feature of these three fuels is that they are all well suited for SI engines and have similar combustion characteristics, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Fumigation ethanol is introduced into the intake air, most commonly with low pressure injectors or carburettors [5,9,-15,41]. The maximum substitutions via fumigation have been in the range of 10-50% of the total energy output of the engine, even though the most commonly studied ethanol ratios have been 10% and 20% [9][10][11]41]. Thermal efficiency has been found to increase when increasing the ethanol substitution, while THC and CO emissions have also clearly increased.…”

Section: Introductionmentioning

confidence: 99%

“…Thermal efficiency has been found to increase when increasing the ethanol substitution, while THC and CO emissions have also clearly increased. Soot and NOx emissions have been reported to decrease when increasing the ethanol substitution [9,10,41]. The difference between dual fuel and fumigation is that with fumigation, the diesel fuel remains the primary energy source and the secondary fuel is used mainly to control diesel combustion.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Sarjovaara

Larmi

2015

Fuel

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In this experimental study, the ethanol/gasoline blend E85 was used as the primary fuel in a dual-fuel combustion concept. The E85 blend was injected at low pressure into the intake manifold and the mixture was ignited via a diesel fuel injection near top dead centre. The research engine was based on a heavy-duty diesel engine equipped with a common-rail injection system. Only the duration of the diesel injection was modified in the diesel injection system during the tests-the other diesel injection parameters were not changed. The goal was to study the possibilities of using the waste material-based E85 ethanol blend on dual-fuel concept as a promising future bio-fuel option. The results were promising, though the engine was not optimised for the combustion concept being studied and minimum modifications were done to the engine. High E85 rates (up to 89%) by energy content were achieved, especially under medium load conditions. On the high and low load portions were lower, but the E85 rates were higher than 30% even in these cases. For most of the cases, the limiting issue was the pressure rise rate, but in cases with the highest portions of E85 the limiting factor was the minimum quantity of the diesel fuel enabling two phase diesel fuel injection. In all cases the E85 increased carbon-monoxide and un-burned hydrocarbon emission, but the nitrogen oxide emission decreased simultaneously in most of the cases. Smoke emissions were low in all cases, but at highest E85 rate smoke emissions further decreased to near zero value.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Sarjovaara

Larmi

2015

Fuel

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“…Therefore the optimum choice seems to be the multi-zone models, which include the effect of changes in engine design and operation on the details of the combustion process, through a phenomenological submodel where the geometric details are fairly well approximated. They have the advantage of relative simplicity and reasonable computer time cost (Ferguson, 1986;Ottikkutti et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Analysis of combustion and pollutants formation in a direct injection diesel engine using a multi-zone model

Rakopoulos

Hountalas

Taklis

et al. 1995

Int. J. Energy Res.

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A two‐dimensional multi‐zone model for the calculation of the closed cycle of a direct injection (DI) diesel engine is presented. The fuel spray is divided into small packages and the effect of air velocity pattern on spray development is taken into account. The calculation of swirl intensity variations during the cycle is based on hybrid solid body‐boundary layer rotation scheme. Application of the mass, energy and state equations in each zone yields local temperatures and cylinder pressure histories. For calculating the concentration of constituents in the exhaust gases, a chemical equilibrium scheme is adopted for the C‐H‐O system of the eleven species considered, together with chemical rate equations for the calculation of nitric oxide (NO). A model for the evaluation of soot formation and oxidation rates is incorporated. A comparison is made between the theoretical results from the computer program implementing the analysis, with experimental results from a vast experimental investigation conducted on a direct injection, Lister‐Petter diesel engine, with very encouraging results. Plots of temperature, equivalence ratio, NO and soot distributions inside the combustion chamber are presented, elucidating the physical mechanisms governing combustion and pollutants formation.

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“…In general, n-zone modeling frameworks are derived in a way to predict pressure derivative based on the known ROHR, e.g. [32,33], whereas in the RT modeling ROHR is usually predicted based on the know pressure trace [8,17,23]. To avoid iterations, n-zone modeling framework, as for example given in [32,33], was rearranged in a way to be an explicit function of derivative of the mass of burned fuel while considering only two zones.…”

Section: Two-zone Combustion Modeling Frameworkmentioning

confidence: 99%

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Vihar

Baškovič

Katrašnik

2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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Abstract. This paper presents a control-oriented thermodynamic model capable of predicting nitrogen oxides (NO x ) emissions in diesel engines. It is derived from zero-dimensional combustion model using in-cylinder pressure as the input. The methodology is based on a two-zone thermodynamic model which divides the combustion chamber into a burned and unburned gas zone. The original contribution of proposed method arises from: (1) application of a detailed two-zone modeling framework, developed in a way that the thermodynamic equations could be solved in a closed form without iterative procedure, which provides the basis for achieving high level of predictiveness, on the level of real-time capable models and (2) introduction of relative air-fuel ratio during combustion as a main and physically motivated calibration parameter of the NO x model. The model was calibrated and validated using data sets recorded in two different direct injection diesel engines, i.e. a light and a heavy-duty engine. The model is suitable for real-time applications since it takes less than a cycle to complete the entire closed cycle thermodynamic calculation including NO x prediction, which opens the possibility of integration in the engine control unit for closed-loop or feed-forward control.

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Multizone Modeling of a Fumigated Diesel Engine

Cited by 12 publications

References 31 publications

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Analysis of combustion and pollutants formation in a direct injection diesel engine using a multi-zone model

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

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Multizone Modeling of a Fumigated Diesel Engine

Cited by 12 publications

References 31 publications

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Analysis of combustion and pollutants formation in a direct injection diesel engine using a multi-zone model

Real-time capable virtual NOx sensor for diesel engines based on a two-Zone thermodynamic model

Contact Info

Product

Resources

About

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model