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Optical study on combustion characteristics of hydrotreated vegetable oil and blends under simulated CI engine conditions and various EGR

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Abstract

Soot and NOx emissions are the inherent combustion characteristics of diesel engines. The modification of fuel property makes for an interesting study of methods for elimination of soot and NOx emissions. HVO and blends of 20 %, 50 %, 80 % by mass of HVO with commercial diesel fuel (mixed 7 % FAME), in combination with various EGR conditions were carried out to evaluate soot and NOx formation, as well as combustion characteristics of HVO blends in RCEM. The obtained results revealed that ignition delay, flame temperature, NOx and soot concentration decreased as HVO percentage increased. Mixing ratios of HVO with diesel showed a similar flame profile at baseline condition, higher flame temperature and darker soot density-KL regions were distributed on the upstream of spray flame. HVO displayed a slightly lower in-flame temperature and KL density, which led to a decrease of 33 % and 15.9 % of NOx and soot concentration, respectively, compared to diesel. By applying higher EGR levels, a reduction of heat release rate, flame temperature and NOx emissions were recorded. Also observed was an increase in ignition delay and soot concentration. Notably, soot at 10 % O2 concentration was lower than that of 15 % O2 concentration.

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

    Vo Tan Chau & Charoenphonphanich Chinda

  2. Faculty of Transportation Engineering, Bach Khoa University (Formerly known as HCMC University of Technology (HCMUT)), Ho Chi Minh City, 700000, Vietnam

    Vo Tan Chau

  3. International College, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

    Karin Preechar

  4. Department of Mechanical and Aerospace Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan

    Susumu Sato & Hidenori Kosaka

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  1. Vo Tan Chau
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  2. Charoenphonphanich Chinda
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  3. Karin Preechar
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  4. Susumu Sato
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  5. Hidenori Kosaka
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Correspondence to Charoenphonphanich Chinda.

Additional information

Recommended by Associate Editor Jeong Park

Vo Tan Chau received the B.Eng. degree in transportation engineering from Ho Chi Minh City University of Technology, Vietnam in 2010 and master degree in mechanical engineering from the Institute of Technology Bandung (ITB), Indonesia in 2013, respectively. He is currently a Ph.D. student in Mechanical Engineering Department of King Mongkut’s Institute of Technology Ladkrabang, Thailand. His research interests include internal combustion engines, alternative fuel, spray and combustion characteristics.

Chinda Charoenphonphanich received the B.Eng. degree in mechanical engineering from King Mongkut’s Institute of Technology Ladkrabang, Thailand in 1991. Then he received master degree and Ph.D. in mechanical engineering from the Tokai University, Japan in 1994, and 2004, respectively. His research interests are internal combustion engines, flow and combustion visualization, alternative fuel technology.

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Chau, V.T., Chinda, C., Preechar, K. et al. Optical study on combustion characteristics of hydrotreated vegetable oil and blends under simulated CI engine conditions and various EGR. J Mech Sci Technol 31, 4521–4531 (2017). https://doi.org/10.1007/s12206-017-0852-3

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  • DOI: https://doi.org/10.1007/s12206-017-0852-3

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