Effects of rapid burning characteristics on the vibration of a common-rail diesel engine fueled with diesel–methanol dual-fuel

Li, Yangyang; Zhang, Chunhua; Yu, Wei; Wu, Han

doi:10.1016/j.fuel.2015.12.045

Cited by 29 publications

(9 citation statements)

References 19 publications

(26 reference statements)

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“…Co-combustion of fuels in the dual fuel engine differs from classical fuel combustion in the conventional engine. However, in most conditions, it is found that the combustion characteristics and heat release rate curves of dual-fuel engines can also be divided into two phases, and its shape is very similar to the typical curves [40]. In the dual fuel engine, the injection of additional fuel to the intake manifold, a homogeneous In the conventional compression ignition engine, the combustion process is performed in two stages.…”

Section: Combustion Characteristicsmentioning

confidence: 98%

“…As the share of alcohol increased, the kinetic combustion period was extended due to the increased heat release rate and intensification of combustion, whereas the diffusion combustion period was reduced. Studies [40] showed that the increased in the percentage ratio of methanol energy to the total energy, from 0% to about 50%, enlarges the kinetic combustion phase, called the rapid burning duration. It is also shown that the proportion of rapid burning heat release in the whole combustion heat release increases dramatically with the increase of the alcohol energy in total fuel energy (alcohol and diesel fuel) supplied to the engine.…”

Section: Combustion Characteristicsmentioning

confidence: 99%

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Comparative Analysis of the Combustion Stability of Diesel-Methanol and Diesel-Ethanol in a Dual Fuel Engine

et al. 2019

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The co-combustion of diesel with alcohol fuels in a compression ignition dual fuel engine is one of the ways of using alternative fuels to power combustion engines. Scientific explorations in this respect should not only concern the combustion process in one engine cycle, which is most often not representative for a longer engine life, but should also include an analysis of multiple cycles, which would allow for indicating reliable parameters of engine operation and its stability. This paper presents experimental examinations of a CI engine with a dual fuel system, in which co-combustion was performed for diesel and two alcohol fuels (methanol and ethanol) with energy contents of 20%, 30%, 40% and 50%. The research included the analysis of the combustion process and the analysis of cycle-by-cycle variation of the 200 subsequent engine operation cycles. It was shown that the presence and increase in the share of methanol and ethanol used for co-combustion with diesel fuel causes an increase in ignition delay and increases the heat release rate and maximum combustion pressure values. A larger ignition delay is observed for co-combustion with methanol. Based on changes in the coefficient of variation of the indicated mean effective pressure (COVIMEP) and the function of probability density of the indicated mean effective pressure (f(IMEP)), prepared for a series of engine operation cycles, it can be stated that the increase in the percentage of alcohol fuel used for co-combustion with diesel fuel does not impair combustion stability. For the highest percentage of alcohol fuel (50%), the co-combustion of diesel with methanol shows a better stability.

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Section: Combustion Characteristicsmentioning

confidence: 98%

Section: Combustion Characteristicsmentioning

confidence: 99%

Comparative Analysis of the Combustion Stability of Diesel-Methanol and Diesel-Ethanol in a Dual Fuel Engine

et al. 2019

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“…21,22 The high analogy of stationary sprays (resulting from the injection of liquid fuels) and turbulent gas jets is frequently used in a number of publications. [23][24][25][26][27] With the continuity equations of fuel and ambient mass flows and the simplified form of the mass flow ratio from equation (7), proportionality relationships for _ m f and _ m a in dependency of fuel density r f , ambient density r a , nozzle hole diameter d, pressure drop Dp and spray cone angle u can be derived as presented in equations (8) and (9)…”

Section: Rectangular Velocity Distribution In Every Distancementioning

confidence: 99%

“…methanol, ethanol and butanol) are under investigation as additive components for Diesel fuel or for utilization in dual-fuel concepts. [4][5][6][7][8][9][10] The alcoholic substances have a very high specific oxygen content, high latent heat of vaporization and a low cetane number and show the potential to simultaneously lower NO x and soot emissions by lowering process temperatures and enhance oxidation. 9,11 In addition, such alternative fuels can be produced from biomass worldwide in a high quality and at marketable prices.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9][10] The alcoholic substances have a very high specific oxygen content, high latent heat of vaporization and a low cetane number and show the potential to simultaneously lower NO x and soot emissions by lowering process temperatures and enhance oxidation. 9,11 In addition, such alternative fuels can be produced from biomass worldwide in a high quality and at marketable prices. Analysing the impact of alcoholic fuels with low density, viscosity and surface tension, the same approach of explanation as for the effect of increasing injection pressure is often found to be used: short-chained alcohols with their characteristic physical properties lead to an improved atomization and thus air entrainment.…”

Section: Introductionmentioning

confidence: 99%

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Air entrainment and mixture distribution in Diesel sprays investigated by optical measurement techniques

Riess

Weiß

Peter

et al. 2017

International Journal of Engine Research

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Mie scattering, Schlieren technique and Raman spectroscopy are used to analyse air entrainment and mixture distribution in sprays at Diesel engine-relevant ambient conditions. Mixture formation for Diesel, gas-to-liquid Diesel, biodiesel (rapeseed methyl ester) and ethanol is investigated. The utilization of different fuels leads to locally equal mass flow ratios of fuel and ambient gas in the spray. The air entrainment process is dominated by conservation of the total spray momentum flux. Shortly after nozzle exit, the amount of ambient gas in the spray is high enough to make it the dominating component of the flow. Already 7 mm after the nozzle exit, the mass flow of ambient gas equals the mass flow of fuel. Also, the local mixture distribution in the spray-investigated by means of Raman spectroscopy-is fuel independent. Different physical properties of the fuels do (nearly) not influence the air entrainment and macroscopic mixture formation process, as the differences and the amount of fuel are too small to have a significant effect. Injection pressure and the resulting momentum flux are the dominating parameters of mixture formation. Because of the magnitude of the ambient gas content, the spray can be regarded as a gas jet.

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A critical review: Application of methanol as a fuel for internal combustion engines and effects of blending methanol with diesel/biodiesel/ethanol on performance, emission, and combustion characteristics of engines

Pandey

2022

Heat Trans

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This article presents a comprehensive overview of methanol as a potential oxygenated fuel for internal combustion engines. Here two approaches have been examined to evaluate the utilization of methanol, namely blending with diesel/biodiesel/methanol and premixing with intake air or fumigation. In conventional compression ignition engines, up to 95% and 25% diesel can be replaced by methanol through fumigation and blending, respectively. Higher latent heat of vaporization of alcohol led to lower peak in‐cylinder pressure and NOx; however, it negatively affects thermal efficiency and hydrocarbon and carbon monoxide emissions. Fumigation of alcohol requires modifications in the existing engine, whereas blending needed surfactants or additives to produce stable alcohol–diesel blends. High injection pressure and late direct injection, methanol–diesel blends have shown lower emissions and proved their potential as a suitable replacement for ethanol–diesel blends from the components durability perspective.

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Effects of rapid burning characteristics on the vibration of a common-rail diesel engine fueled with diesel–methanol dual-fuel

Cited by 29 publications

References 19 publications

Comparative Analysis of the Combustion Stability of Diesel-Methanol and Diesel-Ethanol in a Dual Fuel Engine

Comparative Analysis of the Combustion Stability of Diesel-Methanol and Diesel-Ethanol in a Dual Fuel Engine

Air entrainment and mixture distribution in Diesel sprays investigated by optical measurement techniques

A critical review: Application of methanol as a fuel for internal combustion engines and effects of blending methanol with diesel/biodiesel/ethanol on performance, emission, and combustion characteristics of engines

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