Spray characteristics of bioethanol-blended fuel under various temperature conditions using laser Mie scattering and optical illumination

Jin, Seong-Ho (2022) Spray characteristics of bioethanol-blended fuel under various temperature conditions using laser Mie scattering and optical illumination. Fuels . ISSN 2673-3994

Full content URL: https://doi.org/10.3390/fuels3020013

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Spray characteristics of bioethanol-blended fuel under various temperature conditions using laser Mie scattering and optical illumination
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Abstract

Bioethanol has great potential to reduce emissions in transportation while improving energy se-curity and developing economy. bioethanol has a higher octane-number and a higher enthalpy of vaporisation than gasoline (resulting in charge cooling) – properties that have been used to extend knocking limits. Therefore, bioethanol can be used to substitute gasoline in automotive engine applications. The characteristics of bioethanol spray such as hydrous bioethanol fuel which consists of 93% of bioethanol and 7% of water was investigated under various temperature conditions from sub-zero condition (-15°C) to room temperature (17°C) by means of high-speed direct photography and laser Mie scattering techniques without any seeding materials. The experimental results show that the spray patterns are not significantly changed. In the case of sub-zero temperature condition, the spray tip penetration decreases while the spray angle keeps almost constant once the spray becomes fully developed. The results show that scaling of the spray tip penetration rate achieves reasonable collapse of the experimental results. Normalised droplet diameter was also obtained and shows that larger droplets formed are at sub-zero temperature condition.

Keywords:bioethanol-blended fuel; high-speed direct photography; Mie scattering; spray penetration; droplet diameter
Subjects:H Engineering > H141 Fluid Mechanics
H Engineering > H330 Automotive Engineering
H Engineering > H311 Thermodynamics
Divisions:College of Science > School of Engineering
ID Code:48629
Deposited On:28 Mar 2022 14:33

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