Characteristics of non-evaporating, evaporating and burning sprays of hydrous ethanol diesel emulsified fuels

Li, Tie; Zhang, Xiaoqing; Wang, Bin; Guo, Tao; Shi, Qi; Zheng, Ming

doi:10.1016/j.fuel.2016.11.070

Cited by 69 publications

(33 citation statements)

References 49 publications

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“…Additionally, they stated that for low and high loads conditions, the ethanol fraction is limited due to insufficient ignition energy at a low load and at full load due to a high in-cylinder pressure rise. The engine can also burn so-called hydrated ethanol [26]. It seems that this is a good solution because the removal of water from fermented products of ethanol consumes lots of energy.…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…As mentioned above, HE30 has a smaller cetane number compared to the diesel fuel; therefore, HE30 has a longer ID in the spray combustion process, which implies a longer time for HE30 mixing with air when burning. On the other hand, as discussed above, HE30 has a slightly higher spray tip penetration than the diesel fuel, especially a longer maximum liquid phase length [23], it is beneficial for air entrainment and promotes the fuel-air mixing. For the soot oxidation process, the major factors are the flame temperature and ambient oxygen concentration.…”

Section: Kl Factor Distributionsmentioning

confidence: 95%

“…The emulsions HE30 were developed by employing the Shah's technique [38] The detailed procedure can be found in the literature [23]. The density of HE30 was determined by measuring the volume and weight of the samples.…”

Section: Development Of Emulsionsmentioning

confidence: 99%

“…The spray combustion experiments are implemented on this platform system. In this study, the high-speed shadowgraph is employed to film the two-phase sprays under both nonevaporation and evaporation conditions [23]. The high-speed CMOS camera (NAC HX-6, NAC image technology Inc., Tokyo, Japan) and the xenon lamp were used to establish the optical system of shadowgraph.…”

Section: Development Of Emulsionsmentioning

confidence: 99%

“…Datta and Mandal [13] has found that it can improving the NOx emission with diesel-ethanol blend compared to diesel-methanol blend. Li et al [23] carried out a profound investigation on the characteristics of non-evaporating, evaporating, and burning sprays under various injection and ambient conditions in a high-temperature, high-pressure, constant-volume combustion vessel.…”

Section: Introductionmentioning

confidence: 99%

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Spray Combustion Characteristics and Soot Emission Reduction of Hydrous Ethanol Diesel Emulsion Fuel Using Color-Ratio Pyrometry

Zhang

et al. 2017

Energies

Self Cite

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To elucidate the relationship between physicochemical properties, spray characteristics, and combustion performance, a series of experiments have been conducted in a constant volume vessel with injection of hydrous ethanol diesel emulsion and regular diesel. HE30 (emulsion with 30% volume fraction of 20% water-containing ethanol and 70% volume fraction of 0# diesel) is developed using Shah's technique and regular diesel is also employed for comparison. Firstly, the physicochemical properties of two kinds of fuels are investigated. Then, the non-evaporating and evaporating spray characteristics are examined through the high-speed shadowgraphs. Finally, spray combustion experiments under different ambient oxygen concentrations are carried out, and color-ratio pyrometry (CRP) is applied to measure the flame temperature and soot concentration (KL) distributions. The results indicate that the physicochemical properties, such as density, surface tension, kinematic viscosity, cetane number, and oxygen content, have significant impact on the spray mixture formation and combustion performance. HE30 exhibits lower soot emissions than that of regular diesel. Further analysis supports the standpoint that the hydrous ethanol diesel emulsion can suppress the soot and NO x simultaneously. Therefore, the hydrous ethanol diesel emulsion has great potential to be an alternative clean energy resource.

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Numerical and experimental analysis on spray characteristics of biodiesel (waste cooking oil) using pressure swirl atomizer

Yadav

Gautam

2021

Environ Prog Sustainable Energy

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Atomization characteristics and evaporation have major role in air‐fuel mixing and the combustion process in diesel engine. The aim of this study is to perform numerical and experimental analysis to investigate the spray pattern of biodiesel (waste cooking oil) generated from pressure swirl atomizer. The computation exhibits Eularian‐Lagrangian method to comprise flow of multiphase and also linearized instability sheet atomization (LISA) model to envisage atomization, sheet breakup, and film formation. The model's strength is the identification structure of spray created from pressure swirl atomizer. A three‐dimensional computational fluid dynamics work consisting of LISA and Taylor analogy breakup model are certified via experimentation taken from constant volume chamber. Further, spray tip penetration, cone angle, and sauter mean diameter (SMD) are identified for fuel (B100, B25, and D) under injection pressure of 110 and 160 MPa, and 2.8 MPa ambient pressure using swirl atomizer in constant volume chamber. This particular spray is quite important for application in diesel engines but is not extensively explored. The results reveal that as injection pressure increases from 110 MPa to 160 MPa. The spray tip penetration for B100, B25, and D are increased by 19.86%, 14.90%, and 14.50% respectively, further, cone angle at the start of injection decreases by 6%, 5%, and 3.41%, similarly, the average SMD decreases by 25%, 33.33%, and 25.4%, respectively. This is due to the rheological property of fuel, turbulent energy of droplet and air is maximum in primary breakup zone.

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Characteristics of non-evaporating, evaporating and burning sprays of hydrous ethanol diesel emulsified fuels

Cited by 69 publications

References 49 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

Spray Combustion Characteristics and Soot Emission Reduction of Hydrous Ethanol Diesel Emulsion Fuel Using Color-Ratio Pyrometry

Numerical and experimental analysis on spray characteristics of biodiesel (waste cooking oil) using pressure swirl atomizer

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