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Spray, Combustion, and Air Pollutant Characteristics of JP-5 for Naval Aircraft from Experimental Single-Cylinder CRDI Diesel Engine

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  • Hyungmin Lee

    (Department of Naval Ship Handling, Republic of Korea Naval Academy, Changwon 51704, Korea)

Abstract

This study was performed to analyze the spray, combustion, and air pollutant characteristic of JP-5 fuel for naval aircraft in a spray visualization system and a single-cylinder CRDI diesel engine that can be visualized. The analysis results of JP-5 fuel were compared with DF. The spray tip penetration of JP-5 showed diminished results as the spray developed. JP-5 had the highest ROHR and ROPR regardless of the fuel injection timings. The physicochemical characteristics of JP-5, such as its excellent vaporization and low cetane number, were analyzed to prolong the ignition delay. Overall, the longer combustion period and the lower heat loss of the DF raised the engine torque and the IMEP. JP-5 showed higher O 2 and lower CO 2 levels than the DF fuel. The CO emission level increased as the injection timing was advanced in two test fuels, and the CO emitted from the DF fuel, which has a longer combustion period than JP-5, turned out to be lower. NOx also reduced as the fuel injection timing was retarded, but it was discharged at a higher level in JP-5 due to the large heat release. The images from the combustion process visualization showed that the flame luminosity of DF is stronger, its ignition delay is shorter, and its combustion period is longer than that of JP-5.

Suggested Citation

  • Hyungmin Lee, 2021. "Spray, Combustion, and Air Pollutant Characteristics of JP-5 for Naval Aircraft from Experimental Single-Cylinder CRDI Diesel Engine," Energies, MDPI, vol. 14(9), pages 1-12, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2362-:d:540827
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    References listed on IDEAS

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    1. Lee, Jeongwoo & Lee, Jungyeon & Chu, Sanghyun & Choi, Hoimyung & Min, Kyoungdoug, 2015. "Emission reduction potential in a light-duty diesel engine fueled by JP-8," Energy, Elsevier, vol. 89(C), pages 92-99.
    2. Michaela Hissa & Seppo Niemi & Katriina Sirviö & Antti Niemi & Teemu Ovaska, 2019. "Combustion Studies of a Non-Road Diesel Engine with Several Alternative Liquid Fuels," Energies, MDPI, vol. 12(12), pages 1-15, June.
    3. Hua Zhou & Hong-Wei Zhao & Yu-Peng Huang & Jian-Hui Wei & Yu-Hui Peng, 2019. "Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions," Energies, MDPI, vol. 12(12), pages 1-14, June.
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    Cited by:

    1. Ardebili, Seyed Mohammad Safieddin & Kocakulak, Tolga & Aytav, Emre & Calam, Alper, 2022. "Investigation of the effect of JP-8 fuel and biodiesel fuel mixture on engine performance and emissions by experimental and statistical methods," Energy, Elsevier, vol. 254(PA).

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