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An Insight into Diesel–Ethanol and Diesel–Biodiesel Blends Spraying and Co-combustion in HSDI Diesel Engine

  • Research Article - Mechanical Engineering
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Abstract

Biodiesel and ethanol are known as the typical alternative and renewable fuels that can replace fossil and mineral fuels; however, they can affect combustion due to their undesirable innate traits. The investigation is a numerical attempt to compare the synthesized blended fuels of diesel–ethanol (DE) and diesel–biodiesel (DB) and pure diesel (D100) when combusted in a high-speed direct injection (HSDI) diesel engine. The blends are B10D90, B50D50, E05D95, E10D90, and E85D15. In the initial condition of the code, the fuel is defined as multi-component and the share of each component is determined. The results are indicative of lower ethanol-blended fuel’s mean spray droplet (SMD), thus lower CO2 and soot emissions although it is afflicted with low engine output in terms of power and efficiency. The interaction of SMDE85D15 = 2.5 µm and LHVE85D15 = 31,045.3 kJ/kg with the SMDB50D50 = 2.664 µm and LHVB50D50 = 40335 kJ/kg, droplet diameter is more efficient in emission reduction in better spraying, and on the other hand fuel’s intrinsic heat value is more significant for power generation.

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Abbreviations

AHR:

Accumulated heat release (J)

ATDC:

After top dead center

BD:

Biodiesel–diesel

B50D50:

50% Biodiesel, 50% diesel shares by volume

CA:

Crank angle

D100:

Pure diesel

ECFM-3Z:

Extended coherent flame method-3 zone

ED:

Ethanol–diesel

EGR:

Exhaust gas recirculation

EVO:

Exhaust valve opening

HSDI:

High-speed direct injection

IVC:

Injection valve closing

LHV:

Lower heating value (MJ/kg)

SMD:

Sauter mean diameter (m)

TKE:

Turbulent kinetic energy (m2/s2)

VGT:

Variable geometry turbocharging

u :

Velocity component

x :

Fuel’s volumetric ratio

∂cNO/∂t :

NO concentration variation

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, Malayer University, Malayer, Iran

    Hadi Taghavifar

  2. Young Researchers and Elite Club, Urmia Branch, Islamic Azad University, Urmia, Iran

    Simin Anvari

Authors
  1. Hadi Taghavifar
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  2. Simin Anvari
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Corresponding author

Correspondence to Hadi Taghavifar.

Additional information

Finding The effect of spray disintegration mechanism in diesel engine for ethanol–diesel and biodiesel–diesel in NOx–soot emission is investigated.

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Taghavifar, H., Anvari, S. An Insight into Diesel–Ethanol and Diesel–Biodiesel Blends Spraying and Co-combustion in HSDI Diesel Engine. Arab J Sci Eng 45, 5075–5085 (2020). https://doi.org/10.1007/s13369-020-04343-7

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  • DOI: https://doi.org/10.1007/s13369-020-04343-7

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