Characterisation of the combustion behaviours of individual pulverised coal particles entrained by air using image processing techniques

Qian, Xiangchen; Li, Fengjie; Yan, Yong; Lü, Gang; Liu, Hao

doi:10.1088/1361-6501/abc2ea

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…On the other hand, a lower mass diffusivity of volatiles in CO 2 mixes increases the rate of devolatilization. Using digital photographs, the combustion behaviors of single pulverized coal particles were studied . The characteristics of volatile flames, such as size, brightness, and falling velocity, were investigated.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, a lower mass diffusivity of volatiles in CO the combustion behaviors of single pulverized coal particles were studied. 8 The characteristics of volatile flames, such as size, brightness, and falling velocity, were investigated. The single particle ignition characteristics of coal and biomass fuel blends such as sawdust, wood, and rice husk were studied.…”

Section: Introductionmentioning

confidence: 99%

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Combustion Characteristics and Visualization Analysis of a Biomass Pellet Oriented in Different Positions in a Fixed-Bed Reactor at Different Operating Conditions

El‐Sayed

Khass

Noseir

et al. 2023

Ind. Eng. Chem. Res.

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For all real-world applications, such as fluidized-bed and packed-bed combustion, it is essential to understand the combustion characteristics of an individual solid biomass particle. Under a variety of operating circumstances, investigations on the combustion and mass loss of single pellets of sugarcane (SC) and guava leaves (GL) were conducted. A visualization technique was used to capture the combustion processes of volatile and char. Both homogeneous ignition and hetero–homogeneous simultaneous ignition of both volatiles and char were found. When compared to the material composition and particle-size distribution of the pellet, the brightness of the pellet changed differently with increasing air mass flow rate and hot air temperature. By increasing the hot air temperature and air mass flow rate, the volatile flame of biomass pellets was made shorter and brighter, which lowered the volatile burnout duration. The majority of the entire conversion time is spent on char burning. Compared to other angles, the pellet orientation angle of 30° has a shorter ignition time, a lower surface temperature, and a lower burnout temperature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combustion Characteristics and Visualization Analysis of a Biomass Pellet Oriented in Different Positions in a Fixed-Bed Reactor at Different Operating Conditions

El‐Sayed

Khass

Noseir

et al. 2023

Ind. Eng. Chem. Res.

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AP–HTPB propellant combustion under strain conditions with laser absorption spectroscopy

Gu¹,

Ouyang²,

wang³

et al. 2023

Appl. Opt.

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Understanding the combustion behaviors of solid propellant with different levels of strains is of practical interest. In this work, an experimental study of the effects of static and dynamic strains on the burning rate, temperature, CO, and C O 2 formation of aluminized ammonium perchlorate (AP)-hydroxyl terminated poly-butadiene (HTPB) propellant combustion was presented at initial pressures of 0.1 MPa, 0.2 MPa, and 0.5 MPa. The strains were being applied onto solid propellant by exerting static and cyclic loadings. The propellant burning rate was acquired by a 4 kHz high-speed photography system, and the combustion temperature, CO, and C O 2 column densities were measured at 10 kHz through laser absorption spectroscopy (LAS). At atmospheric pressure, it was demonstrated that the propellant burning rate increased with tensile stress and decreased with compressive stress. The measured flame temperature showed a similar correlation with strains as compared to the propellant burning rate. At elevated pressures, the increase of the propellant burning rate due to tensile stress was more evident, while the difference in combustion temperatures was less significant. For the cyclic strain condition, the variations of the measured C O 2 and CO column densities were consistent with the static strain condition.

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Characterisation of the combustion behaviours of individual pulverised coal particles entrained by air using image processing techniques

Cited by 2 publications

References 26 publications

Combustion Characteristics and Visualization Analysis of a Biomass Pellet Oriented in Different Positions in a Fixed-Bed Reactor at Different Operating Conditions

Combustion Characteristics and Visualization Analysis of a Biomass Pellet Oriented in Different Positions in a Fixed-Bed Reactor at Different Operating Conditions

AP–HTPB propellant combustion under strain conditions with laser absorption spectroscopy

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