Numerical Analysis of the Particle-Induced Effect on Gas Flow in a Supersonic Powder-Laden Oxygen Jet

Li, Mingming; Li, Lin; Zhang, Bo; Li, Qiang; Wu, Wei; Zou, Zongshu

doi:10.1007/s11663-020-01855-3

Cited by 23 publications

(7 citation statements)

References 22 publications

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“…According to the above assumptions, the main governing equations included in this study are: mass equation, momentum equation, and energy equation. The equation is as follows (Equations ( 1) -( 6)) [15,28]:…”

Section: Governing Equationsmentioning

confidence: 99%

Supersonic jet characteristics of two parameter oxygen lance nozzle

Feng

Xia

Wei

et al. 2021

Ironmaking & Steelmaking

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Increasing the oxygen supply intensity of a converter is the main method of shortening the smelting time. However, the increase in oxygen supply intensity increases the splashing rate of the smelting process. Therefore, balancing these two phenomena is the content of many academic and metallurgical studies. However, the studies on the characteristics of O 2 + CO 2 mixed injection by a dual-parameter oxygen lance nozzle are rare. In this study, the effects of ambient temperature and gas flow rate on the characteristics of 92% O 2 + 8% CO 2 mixed jet were observed through simulations and analysed using Ansys Fluent commercial software. Results show that at 1773 K ambient temperature, the mixing degree of each jet of the new dual-parameter oxygen lance nozzle is lower than that of the conventional oxygen lance nozzle. In addition, the jet independence of the new nozzle is better than that of the conventional nozzle. Under the same distance, the impact area of the jet is large. By increasing the gas supply flow rate of the new dual-parameter oxygen lance nozzle by 5000 Nm 3 /h, the average velocity of the molten pool is increased by ∼9%. Combined with the advantages of CO 2 smelting, the new dual-parameter nozzle can increase the oxygen supply intensity and inhibit splashing.

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Section: Governing Equationsmentioning

confidence: 99%

Supersonic jet characteristics of two parameter oxygen lance nozzle

Feng

Xia

Wei

et al. 2021

Ironmaking & Steelmaking

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“…In addition to considerable experimental efforts, computational fluid dynamics (CFD) method, which can reduce time and cost significantly in developing technologies with multiphase flows, is also one of the main approaches of spouted bed research. The most popular CFD approaches for modeling the gas–solid multiphase flow dynamics in spouted beds are the two fluid method (TFM) and discrete element method (DEM) models. − Moliner et al simulated a pseudo-two-dimensional (pseudo-2D) spouted bed employing the TFM approach, founding that drag force and the definition of the granular phase have the most significant impact on the solution. Adnan et al systematically investigated the sensitivity of different modeling parameters in a three-dimensional (3D) tapered fluidized bed reactor and reached the same conclusion.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Jiao

Wang

Mei

et al. 2023

Ind. Eng. Chem. Res.

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As an essential resource, the drying, upgrading, and efficient utilization of lignite are of great significance to the development of the low-carbon economy. In this work, a novel drying system, combining a pneumatic and spouted bed, is designed to achieve lignite deeply dewatering. The system is investigated experimentally and numerical simulated to characterize the hydrodynamics of particles moving across the domain, such as pressure drop, fountain height, and pressure fluctuation. The results show that there is a critical gas velocity that changes the flow pattern of the bed when the static bed is higher than 50 mm. When the gas velocity increases to the critical value, the spouting state becomes unstable and the corresponding pressure drop will undergo a secondary mutation. This work provides a deeper understanding of the flow structure and particle motion in the novel drying system under various industrial operating conditions.

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“…Based on the diffusion mechanism of dusty airflow and the energy dissipation theory, the geometric structure of the transport chute was improved, and a composite straight-arc chute dust suppression device was proposed. In studies [21][22][23][24], according to the motion characteristics of the induced airflow during the transfer of loose materials in a chute, a return flow structure was set in the material-guide chute to form eddy currents to promote the internal airflow hedge, and thus reduce the induced airflow speed. In addition, a dust curtain was set in the dust removal area of the maze to further consume the kinetic energy of the airflow and allow the dust carried by the dusty air to settle to suppress the dust.…”

Section: Introductionmentioning

confidence: 99%

Flow Field Characteristics of Fugitive Dust from Grab Unloading in an Open Space

Zhang,

Meng,

Zhang

et al. 2023

Processes

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Aiming at addressing the problem of dust generated when grab is unloaded, the flow field characteristics of fugitive dust in an open space were studied and reflected its unstable and complex nonlinear dynamic process. Using coal, sand, and flour as research objects, an experimental model and measurement system for grab unloading were built, and the dust diffusion range, diffusion speed and direction, settling time, dust concentration, and induced wind velocity at different measurement points were compared. The computational fluid dynamics–discrete element method (CFD-DEM) coupling method was adopted, the discrete phase model (DPM) of dust was established, the interaction of the particle, dust, and airflow fields during the unloading process of the grab was further studied, and the distribution and diffusion laws of the induced airflow and dust were obtained. The acquisition of flow field characteristics is of great significance for controlling and guiding the orderly deposition of dust.

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Numerical Analysis of the Particle-Induced Effect on Gas Flow in a Supersonic Powder-Laden Oxygen Jet

Cited by 23 publications

References 22 publications

Supersonic jet characteristics of two parameter oxygen lance nozzle

Supersonic jet characteristics of two parameter oxygen lance nozzle

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Flow Field Characteristics of Fugitive Dust from Grab Unloading in an Open Space

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