Comprehensive Spray Characteristics of Water in Port Fuel Injection Injector

Jeonghyun Park, Kyung-Hwan Lee and Suhan Park
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Jeonghyun Park: Department of Mechanical Engineering, Graduate School of Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
Kyung-Hwan Lee: School of Mechanical and Aerospace Engineering, Sunchon National University, 255 Jungang-ro, Suncheon-si, Jeonnam 57922, Korea
Suhan Park: School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea

Energies, 2020, vol. 13, issue 2, 1-13

Abstract: The objective of this study was to compare the injection and spray characteristics of water with n-heptane using a port fuel injection (PFI) system. In this study, the injection pressure was changed to 0.3–0.9 Mpa and the energizing duration was changed to 0.5–4 ms. To investigate spray characteristics, the injection quantities of n-heptane and water were measured. Macroscopic spray characteristics were determined through spray visualization. The Sauter mean diameter (SMD) and velocity of spray droplets were measured with a phase Doppler anemometry (PDA) experiment. Spray tip penetration, spray angle, SMD of droplets, and spray droplet velocity were compared. As the injection pressure increased, the injection quantity and the droplets velocity increased. However, the spray tip penetration, SMD of the droplet, and the spray angle decreased. The increase in energizing duration led to an increase in the injection quantity without affecting other spray characteristics. The higher density of water also increased injection quantity, resulting in a decrease in spray tip penetration and increases of SMD and velocity of spray droplets due to high viscosity and surface tension of water.

Keywords: spray; port fuel injection (PFI) system; water injection; n-heptane; droplet size; droplet velocity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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