Effect of stator geometry of impact pulverizer on its grinding performance

Nakamura, Hideya; Kan, Hiroyuki; Takeuchi, Hirohisa; Watano, Satoru

doi:10.1016/j.ces.2014.10.011

Cited by 11 publications

(4 citation statements)

References 19 publications

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“…In the simulation of a comminution process by CFD-DPM, more attention is paid to particle tracking and particle-wall interaction. For instance, in the impact crusher [44][45][46], the particle and flow behavior after the collision of high-speed particles accelerated by air flow with stator and wall were studied, which explained the mechanism of the particle impacting the wall to a certain extent. However, there are two problems that must be solved: On the one hand, the input of a large number of particles will inevitably produce collision.…”

Section: Comminutionmentioning

confidence: 99%

Computational Fluid Dynamics–Discrete Phase Method Simulations in Process Engineering: A Review of Recent Progress

Yang,

Xi,

Qin

et al. 2024

Applied Sciences

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Complex fluid–solid systems generally exist in process engineering. The cognition of complex flow systems depends on numerical and experimental methods. The computational fluid dynamics–discrete phase method simulation based on coarsening technology has potential application prospects in industrial-scale equipment. This review outlines the computational fluid dynamics–discrete phase method and its application in several typical types of process engineering. In the process research, more attention is paid to the dense condition and multiphase flow. Furthermore, the CFD-DPM and its extension method for comprehensive hydrodynamics modeling are introduced. Subsequently, the current challenges and future trends of the computational fluid dynamics–discrete phase method are proposed.

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Section: Comminutionmentioning

confidence: 99%

Computational Fluid Dynamics–Discrete Phase Method Simulations in Process Engineering: A Review of Recent Progress

Yang,

Xi,

Qin

et al. 2024

Applied Sciences

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“…Based on the solution of the N–S equation, a new transport equation is introduced for these two variables. Consequently, this model is widely utilized in simulation analysis of the hammer mill’s airflow field. , The continuity equation, Reynolds-averaged Navier–Stokes (RANS), energy equation, and ideal gas state equation are all solved by the model to determine the airflow. The governing equations of continuity, RANS equation, energy, and state of the ideal gas are as follows.…”

Section: Numerical Modelingmentioning

confidence: 99%

Numerical Simulation and Analysis of the Airflow Field in the Crushing Chamber of the Hammer Mill

Li,

Jiang,

Zeng

et al. 2024

ACS Omega

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The airflow dynamics within hammer mills' crushing chambers significantly affect material crushing and screening. Understanding the crushing mechanism necessitates studying the airflow distribution. Using a self-built crushing test platform and computational fluid dynamics (CFD) simulations, we investigated the impact of screen aperture size, rotor speed, hammer-screen clearance, hammer quantity, and mass flow rate on airflow distribution within the rotor region, circulation layer, and screen apertures. Results indicated generally uniform axial static pressure distribution within the rotor region, with radial gradients. Increased rotor speed improved radial static pressure gradients, while higher mass flow rates reduced them. The highest airflow velocity within the circulation layer reached approximately 83.46% of the hammer tip's tangential velocity. Greater rotor speed and hammer quantity intensified circulation airflow, whereas increased mass flow rate decreased it. Eddies formed within screen apertures with higher rotor speeds and hammer quantities but diminished with larger apertures and higher mass flow rates. Static pressure differences across screen apertures increased with mass flow rate and rotor speed but decreased significantly with larger apertures. This systematic examination provides insights into airflow distribution within hammer mill crushing chambers, offering a theoretical foundation for improving and designing hammer mills.

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“…The grinding of cereal feed can increase its surface area, which is beneficial for improving the digestibility and palatability of feed (Dey et al, 2013;Ghodki & Goswami, 2018). Hammer mills have the widest application due to their advantages of simple structure, good versatility and convenient maintenance (Wang et al, 2020;Bochat et al, 2015;Nakamura et al, 2015). However, hammer mills exhibit low productivity and high energy consumption in production (Polari & Wang, 2019;Tian et al, 2018;Cao et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Dem Simulation and Experiment of Corn Grain Grinding Process

et al. 2021

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To improve the working performance of hammer mill, cutting-edge hammer and oblique hammer were designed in this study. The advantages of new hammers were theoretically analyzed. The grinding process of corn grain with different hammers was studied by discrete element method (DEM) and experiments. Discrete element simulation results showed that under same rotor speed conditions, the cutting-edge hammer had highest bond-breaking efficiency in corn grain model. The oblique hammer could reduce the incident angle of corn grain and improve sieving efficiency. The motion trajectory of corn grain in grinding chamber was relatively dispersed and similar when using common hammer and cutting-edge hammer, and the motion trajectory was more concentrated when oblique hammer was used. The experimental results showed that both cutting-edge hammer and oblique hammer could improve the working performance of hammer mill. The productivity of hammer mill could be improved by using cutting-edge hammer, electricity consumption per ton and temperature rise of feed could be reduced by using oblique hammer, and the experimental results were consistent with simulation results and theoretical analysis results. The research results can provide references for the design of new hammer and the grinding process simulation of other agricultural materials.

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Effect of stator geometry of impact pulverizer on its grinding performance

Cited by 11 publications

References 19 publications

Computational Fluid Dynamics–Discrete Phase Method Simulations in Process Engineering: A Review of Recent Progress

Computational Fluid Dynamics–Discrete Phase Method Simulations in Process Engineering: A Review of Recent Progress

Numerical Simulation and Analysis of the Airflow Field in the Crushing Chamber of the Hammer Mill

Dem Simulation and Experiment of Corn Grain Grinding Process

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