Similarity and normalization study of fuel spray and combustion under ultra-high injection pressure and micro-hole diameter conditions–spray characteristics

Zhai, Chang; Liu, Erwei; Zhang, Gengxin; Xing, Wenjing; Chang, Feixiang; Jin, Yu; Luo, Hongliang; Nishida, Keiya; Ogata, Yoichi

doi:10.1016/j.energy.2023.129684

Cited by 9 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On one hand, changes in fuel properties can lead to variations in needle valve movement, liquid core breakup, and spray characteristics [20][21][22][23][24]. Furthermore, the composition, volatility, density, viscosity, and other physical and chemical properties of fuels have a direct impact on how effectively they mix with air, the stability of the resulting mixture, and the characteristics of the combustion process [25,26]. Therefore, as the first step in the ongoing synthetic fuels investigation, the unveiling physical and chemical properties of synthetic fuels is deemed crucial.…”

Section: Articlementioning

confidence: 99%

Investigation on Fuel Properties of Synthetic Gasoline-like Fuels

Huang,

Koichi,

Yohko

et al. 2024

IJAMM

View full text Add to dashboard Cite

Article Investigation on Fuel Properties of Synthetic Gasoline-like Fuels Weidi Huang 1,2, Koichi Kinoshita 1,*, Yohko Abe 1, Mitsuharu Oguma 1, and Kotaro Tanaka 2,3 1 Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology, 1-2-1 Namiki, Tsukuba, Ibaraki 305-8564, Japan 2 Carbon Recycling Energy Research Centre, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan 3 Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan * Correspondence: koichi-kinoshita@aist.go.jp Received: 8 November 2023 Accepted: 25 March 2024 Published: 27 March 2024 Abstract: Synthetic fuels have gained considerable attention due to their promising characteristics. A comprehensive survey was undertaken to assess the availability of synthetic fuels in the global market, followed by an investigation to evaluate their potential in engines. This report presents the initial findings regarding the physical and chemical properties of synthetic gasoline-like fuels, specifically DMC (dimethyl carbonate), bioethanol, EtG (ethanol-to-gasoline), G40, and bio-naphtha. A comparison was conducted between these synthetic fuels and conventional gasoline. Furthermore, discussions were provided to enhance the understanding of the potential influence of fuel properties on spray and combustion characteristics. EtG and G40 are specifically designed to emulate conventional gasoline. Results indicate that EtG and gasoline should be directly interchangeable in the engine or blended in any proportion because they have almost identical Research Octane Number (RON)/Motor Octane Number (MON), fuel density, and higher heating value (HHV). G40 has a higher RON (105) compared with that of gasoline (92.2), likely resulting from the high content of iso-paraffin in G40. Bio-naphtha exhibits the high fraction of paraffin and naphthene content relative to other fuels. The feature of chemical compositions results in a lower RON (55.9), lower HHV and smaller fuel density compared to other fuels. DMC and bioethanol blends in gasoline were investigated. Regardless of whether DMC or bioethanol is incorporated, under a 60% blend ratio, gasoline distillation accelerates initially, until DMC or bioethanol completely evaporates, after which gasoline distillation returns to its normal rate. With increasing the volumetric fraction of the ethanol in the blends, either chemical compositions or the RON/HHV basically change linearly.

show abstract

Section: Articlementioning

confidence: 99%

Investigation on Fuel Properties of Synthetic Gasoline-like Fuels

Huang,

Koichi,

Yohko

et al. 2024

IJAMM

View full text Add to dashboard Cite

show abstract

“…Increasing fuel injection pressure needs to be combined with other structural modifications of the injectors, the combustion chamber, and other engine advances that reduce the specific fuel consumption by up to 4% [21]. At the same time, the fuel injection pressure has a direct effect on the vaporization and air-fuel mixing efficiency in the combustion chamber [17,18,23]. Under high-load conditions, engine power is related to the penetration rate of the fuel spray and the combustion rate of the fuel-air mixture in the combustion chamber [24,25].…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Impact of Piston Bowl Size on Diesel Engine Characteristics with Changes in Fuel Injection Pressure and Boost Pressure

Nguyen,

Dunin

2024

Applied Sciences

View full text Add to dashboard Cite

This study presents the effects of piston bowl size on the characteristics of a four-stroke single-cylinder diesel engine, which is considered in relation to changes in factors such as fuel injection pressure and turbocharger pressure. The study was carried out by 3D modeling using AVL Fire with an omega combustion chamber size and dimensions determined by the ratio between the diameter and depth of the piston bowl, which varies from 3.4 to 10.0. Additionally, the turbocharger pressure varies from 0.15 to 0.45 MPa at an engine speed of 1400 rpm and fuel injection pressure up to 300 MPa. The results show that the engine reaches the best values of indicated power, fuel efficiency, and a substantial decrease in emissions of nitrogen oxides at a turbocharger pressure from 0.25 to 0.35 MPa and with a ratio of the diameter to the depth from 7.8 to 10. However, the injection angle changes slightly, and the penetration depth and the tip velocity decrease with increasing boost pressure. While the piston bowl parameters only impact significantly on the tip velocity, the penetration and the spray angle are almost unchanged. In addition, the variation in the diameter of the combustion chamber has an influence on the fluctuation of the spray tip velocity and penetration.

show abstract