An analysis of spray development with iso-octane, n-pentane, gasoline, ethanol and n-butanol from a multi-hole injector under hot fuel conditions

Aleiferis, P.G.; Romunde, Z. R. van

doi:10.1016/j.fuel.2012.07.044

Cited by 231 publications

(135 citation statements)

References 25 publications

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“…Gasoline and methane remained quite close over the full range of temperatures and spark advances, with greatest similarity at the higher spark advances when the engine was cold and at the lower spark advances when the engine's set temperature was 50-90 C. Iso-octane remained clearly isolated throughout most tested conditions, except with the large spark advances at 50-90 C. At the larger spark advances of 40 -50 CA the COV Pmax of both alcohols was quite similar to that of methane (4-6%), and the P max of methane was lower than the alcohols' by only 0.5-1.5 bar. It is interesting to point out that the differences in spray break-up and evaporation at low temperatures for the two alcohol fuels observed in Serras-Pereira et al (2008) and Aleiferis and van Romunde (2013) did not really appear to impede those fuels from achieving similar or better performance than the hydrocarbons.…”

Section: Combustion Behavior In a Direct-injection Si Engine 501mentioning

confidence: 86%

An Analysis of the Combustion Behavior of Ethanol, Butanol,Iso-Octane, Gasoline, and Methane in a Direct-Injection Spark-Ignition Research Engine

Serras-Pereira

Aleiferis

Richardson

2013

Combustion Science and Technology

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Future automotive fuels are expected to contain significant quantities of bio-components. This poses a great challenge to the designers of novel low-CO 2 internal combustion engines because biofuels have very different properties to those of most typical hydrocarbons. The current article presents results of firing a direct-injection spark-ignition optical research engine on ethanol and butanol and comparing those to data obtained with gasoline and iso-octane. A multihole injector, located centrally in the combustion chamber, was used with all fuels. Methane was also employed by injecting it into the inlet plenum to provide a benchmark case for well-mixed ''homogeneous'' charge preparation. The study covered stoichiometric and lean mixtures (k ¼ 1.0 and k ¼ 1.2), various spark advances (30-50 CA), a range of engine temperatures (20-90 C), and diverse injection strategies (single and ''split'' triple). In-cylinder gas sampling at the spark-plug location and at a location on the pent-roof wall was also carried out using a fast flame ionization detector to measure the equivalence ratio of the in-cylinder charge and identify the degree of stratification. Combustion imaging was performed through a full-bore optical piston to study the effect of injection strategy on late burning associated with fuel spray wall impingement. Combustion with single injection was fastest for ethanol throughout 20-90 C, but butanol and methane were just as fast at 90 C; iso-octane was the slowest and gasoline was between iso-octane and the alcohols. At 20 C, k at the spark plug location was 0.96-1.09, with gasoline exhibiting the largest and iso-octane the lowest value. Ethanol showed the lowest degree of stratification and butanol the largest. At 90 C, stratification was lower for most fuels, with butanol showing the largest effect. The work output with triple injection was marginally higher for the alcohols and lower for iso-octane and gasoline (than with single injection), but combustion stability was worse for all fuels. Triple injection produced a lower degree of stratification, with leaner k at the spark plug than single injection. Combustion imaging showed much less luminous late burning with tripe injection. In terms of combustion stability, the alcohols were more robust to changes in fueling (k ¼ 1.2) than the liquid hydrocarbons.

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Section: Combustion Behavior In a Direct-injection Si Engine 501mentioning

confidence: 86%

An Analysis of the Combustion Behavior of Ethanol, Butanol,Iso-Octane, Gasoline, and Methane in a Direct-Injection Spark-Ignition Research Engine

Serras-Pereira

Aleiferis

Richardson

2013

Combustion Science and Technology

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“…Additionally ethanol has shown similar behaviour to gasoline in terms of spray effects related to temperature and pressure conditions (e.g. see Aleiferis et al 2010a-b;Serras-Pereira et al, 2010;Aleiferis and van Romunde, 2013). However, iso-octane was also selected as a single component for the current vapour dispersion study since it is the compound with similar total percentage in gasoline to that of the sum of pentanes (C5); it is also a typical fuel used as substitute for gasoline for various research purposes.…”

Section: Vapour Typesmentioning

confidence: 98%

Numerical investigation of VOC levels in the area of petrol stations

Kountouriotis

Aleiferis

Charalambides

2014

Science of The Total Environment

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“…The pseudo-binary gasoline+alcohol mixtures were prepared at room temperature for various volume fractions, in order to cover the entire composition range. 3 ) 0.7919 0.8034 0.7909 [13] 0.7950 [14] 0.7851 0.7855 [15] 0.7853 [16] 0.8102 0.8101 [17] 0.8097 [13] Dynamic viscosity at 40 o C (mPa•s) 0.3673 0.9081 0.829 [18] 0.837 [19] 1.3236 1.3470 [16] 1.3500 [20] 1.7769 1.7696 [21] Refractive index at 20 o C 1.4520 1.3624 1.362 [22] 1.3766 1.3750 [23] 1.3752 [24] 1.3991 1.3950 [22] 1.3991 [25] The experimental uncertainty in volume fraction was estimated to be less than ±0.002. The mixtures were prepared in airtight narrow-mouth ground glass stoppered bottle, in order to minimize the evaporative losses.…”

Section: Methodsmentioning

confidence: 99%

Study of the refractive index of gasoline+alcohol pseudo-binary mixtures

Nita

Geacai

Iulian

et al. 2017

Ovidius University Annals of Chemistry

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Abstract. The properties of gasoline change as a result of blending with a bioalcohol, affecting the behavior of the pseudo-binary system. The aim of this paper is to present experimental data of the refractive index for pseudobinary mixtures of a reformate gasoline with ethanol, isopropanol and n-butanol over the entire composition range and for temperature ranging from 293.15 K to 313.15 K. The accuracy of different equations to predict the refractive index of the mixtures was tested. The best prediction accuracy (the lower AAD) corresponded to Eykman and Lorentz-Lorenz mixing rules. A logarithmic equation proposed to correlate the refractive index with composition and temperature of gasoline+alcohol mixtures showed a good accuracy (the absolute average deviation AAD < 0.052%). The deviations in refractive index for investigated systems are negative over the entire composition range and at all investigated temperatures.

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An analysis of spray development with iso-octane, n-pentane, gasoline, ethanol and n-butanol from a multi-hole injector under hot fuel conditions

Cited by 231 publications

References 25 publications

An Analysis of the Combustion Behavior of Ethanol, Butanol,Iso-Octane, Gasoline, and Methane in a Direct-Injection Spark-Ignition Research Engine

An Analysis of the Combustion Behavior of Ethanol, Butanol,Iso-Octane, Gasoline, and Methane in a Direct-Injection Spark-Ignition Research Engine

Numerical investigation of VOC levels in the area of petrol stations

Study of the refractive index of gasoline+alcohol pseudo-binary mixtures

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