Size evolution of soot particles from gasoline and n-heptane/toluene blend in a burner stabilized stagnation flame

Lin, Baiyang; Gu, Hao; Guan, Bin; Han, Dong; Gu, Chen; Huang, Zhen; Lin, He

doi:10.1016/j.fuel.2017.04.097

Cited by 20 publications

(12 citation statements)

References 45 publications

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“…The competition between persistent nucleation and size growth of soot particles led to the observed bimodality . This typical bimodal PSDF has been observed previously in premixed flames of ethylene, ,,,− propene, butane/butanol isomers, n -dodecane, heptane/toluene blends, and practical gasoline . With increased H p , the nucleation tail was attenuated in the MCH flame, while it remained relatively pronounced in the HEP flame.…”

Section: Resultssupporting

confidence: 74%

“…The experimental and computational methods have been described in detail in the previous work of the authors. − Figure schematically shows the experimental setup. The flame burner consisted of a bronze porous plug and a concentric porous ring.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

“…The studied flame conditions were listed in Table , which were typical lightly sooting flame conditions − with a C/O mole ratio of 0.6, a maximum temperature of around 1830 K, and a diluent gas proportion of 60%. The PSDF measurement of n -heptane and methylcyclohexane was carried out at different plate to burner separations ( H p , namely, the flame height).…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

“…Previous studies , revealed that, owing to the orifice flow, the sample taken with the current experimental technique represented an average of the gas volume immediately adjacent to the orifice and that such a volume could be represented by shifting the spatial position a few millimeters upstream from the stagnation surface. Here, we chose 1 mm , as the approximate shift for particle residence time modification. Hence, a modified particle residence time is given by eq where x s = H p – 0.1 cm.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

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Size Distribution of Soot Particles in Premixed n-Heptane and Methylcyclohexane Flames

Lin

Nie

et al. 2018

Energy Fuels

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The size distributions of soot particles from premixed n-heptane and methylcyclohexane flames were measured and compared at different particle residence times. The micro-orifice probe sampling technique and the scanning mobility particle sizer were used for the particle size measurement in the burner-stabilized stagnation flame configuration. For both flame series, the mixture C/O mole ratio was 0.6 and the maximum flame temperature was controlled around 1835 K to investigate the fuel structure effects on soot propensity. It was observed that, with the increased particle residence time, the particle size distribution function of both flames evolved from the unimodal (only the nucleation mode) to the bimodal (both the nucleation and coagulation modes) distribution. The particle nucleation strength and particle growth rate of the methylcyclohexane flame were quantitatively lower than those of the n-heptane flame. Considering the equivalence ratio difference between the two flames, the sooting propensity disparity between cycloalkanes and n-alkanes is not considerable under the test conditions.

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Section: Resultssupporting

confidence: 74%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

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Size Distribution of Soot Particles in Premixed n-Heptane and Methylcyclohexane Flames

Lin

Nie

et al. 2018

Energy Fuels

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“…This has been demonstrated in premixed burner flames, where longer residence time in high temperature regions of the flame led to the formation of larger soot particles by surface growth and agglomeration. 37 Figure 16, which shows the correlation between the maximum in-cylinder temperature and average particles size, gives suggestion similar mechanisms take place in engines as spark timing is retarded. Figure 17 outlines the correlations between total PN and in-cylinder peak temperature across the spark timing sweeps.…”

Section: Part 2: Effect Of Fuel Composition On Pm Characterisation Anmentioning

confidence: 85%

Investigating the impact of gasoline composition on PN in GDI engines using an improved measurement method

Bokor

Rohani

Humphries

et al. 2020

International Journal of Engine Research

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An experimental investigation was carried out to investigate Particulate Number (PN) emissions from a modern, small-capacity Gasoline Direct Injection (GDI) engine. The first part of the study focused on improving measurement repeatability using the Cambustion DMS-500 device. Results showed that sampling near the exhaust valve – while dampening the pressure oscillations in the sampling line – can significantly improve the repeatability. It was also found that uncontrolled phenomena such as deposition in the exhaust system from earlier engine operation can undermine the accuracy of measurements taken at tailpipe level. The second part of the work investigated PN emissions from three types of gasoline fuel, Pump-grade, Performance and Reference. Fuel chemical composition was found to have an appreciable impact on PN, but the magnitude of this effect differs in various operating points, being more pronounced at higher engine load. The Reference fuel was found to have the lowest PN emission tendency, conceivably because of its lower aromatics, olefins and heavy hydrocarbons content. A sweep of operating parameters showed that higher injection pressure reduces PN, but the extent of the reduction depends on fuel physical properties such as volatility.

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Effects of Magnetic Fields on Morphology and Nanostructure Evolution of Incipient Soot Particles from n-heptane/2,5-dimethylfuran Inverse Diffusion Flames

2020

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Size evolution of soot particles from gasoline and n-heptane/toluene blend in a burner stabilized stagnation flame

Cited by 20 publications

References 45 publications

Size Distribution of Soot Particles in Premixed n-Heptane and Methylcyclohexane Flames

Size Distribution of Soot Particles in Premixed n-Heptane and Methylcyclohexane Flames

Investigating the impact of gasoline composition on PN in GDI engines using an improved measurement method

Effects of Magnetic Fields on Morphology and Nanostructure Evolution of Incipient Soot Particles from n-heptane/2,5-dimethylfuran Inverse Diffusion Flames

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