mixing and dispersion of particle ropes in lean phase

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Mixing and dispersion of particle ropes in lean phase ...

2001-9-24  The objective of this study was to investigate mixing mechanisms in lean phase pneumatic conveying, with the emphasis on techniques for dispersing the severe particle stratification caused by flow through a 90° elbow. This type of stratification is referred to as a particle rope.

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Mixing and dispersion of particle ropes in lean phase ...

2017-9-6  Mixing and dispersion of particle ropes in lean phase pneumatic conveying Harun Bilirgen, Edward K. Levy) Energy Research Center, Lehigh UniÕersity, 117 ATLSS DriÕe, Bethlehem, PA 18015, USA Received 21 August 2000; received in revised form 4 November 2000

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Lehigh University: Energy Research Center: Current ...

2018-5-1  "Mixing and dispersion of particle ropes in lean phase pneumatic conveying" "CoalCONTROL™ – Emissions Reduction Through Burner Balancing" FOSSIL ENERGY CATEGORIES

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Formation and dispersion of ropes in pneumatic

2001-1-15  Particle concentration contours showing the effects of (a) turbulence and (b) secondary flows on particle dispersion ( R / D =1.5, Uo =30 m/s and μ =0.33). The present study demonstrates that organized large scale fluid motions such as secondary flows created in elbows contribute to the dispersion of particle ropes.

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harun bilirgen Lehigh University - Academia

2014-1-16  Mixing and dispersion of particle ropes in lean phase pneumatic conveying more by harun bilirgen The objective of this study was to investigate mixing mechanisms in lean phase pneumatic conveying, with the emphasis on techniques for dispersing the severe particle stratification caused by flow through a 90° elbow.

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Formation and dispersion of ropes in pneumatic

2001-1-15  In this study, the solid flow nonuniformities which develop in lean phase upward flow in a vertical pneumatic conveying line following a horizontal-to-vertical elbow were investigated. Laboratory experiments were conducted in 154 and 203 mm I.D. test sections using pulverized-coal particles (90% less than 75 μm) for two different 90° circular elbows having pipe bend radius to pipe diameter ratios

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Numerical simulation of gas-liquid flow through a 90° duct ...

2017-3-9  Bilirgen, H., Levy, E.K., 2011. Mixing and dispersion of particle ropes in lean phase pneumatic conveying. Powder Technology, 119(2-3):134–152. dx.doi/10.1016/S0032-5910(00)00413-7 Article Google Scholar Burger, M., Klose, Get al

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Experimental measurements of gas–solid flow and

2016-4-1  The measurements indicate that the pipe length upstream of the splitter has an important effect on the particle dispersion at transverse sections A, B, and C of the splitter. Because of the roping phenomenon caused by the upstream elbow, the maximum/minimum solid concentration ratios of sections A, B, and C decreased with an increase in the pipe length.

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[PDF] PEPT — A novel tool for investigation of

Abstract Bends are integral parts of a pneumatic conveying system. However, the presence of bends often leads to undesirable phenomena such as roping, particle segregation and attrition, particle deposition and pipe abrasion. It is important to understand the particle motion in the vicinity of bends to better address these issues.

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Wang Bing-清华大学航天航空学院

2021-3-9  New conception propulsion, combined cycle power (RDBCC, RBCC, TBCC), Scramjet, green-propellant LRE and engine cooling and dry gas sealing technologies. E. Energy and environment science, especially pollutant particle dispersion, cavitations triggering and bubble collapse, as well as their interaction in multi-physics.

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harun bilirgen Lehigh University - Academia

2014-1-16  Mixing and dispersion of particle ropes in lean phase pneumatic conveying more by harun bilirgen The objective of this study was to investigate mixing mechanisms in lean phase pneumatic conveying, with the emphasis on techniques for dispersing the severe particle stratification caused by flow through a 90° elbow.

Get price

Experimental measurements of gas–solid flow and

2016-4-1  Mixing and dispersion of particle ropes in lean phase pneumatic conveying. Powder Technology, 119 (2–3 ... Experimental measurements of a gas–solid jet downstream of a fuel-rich/lean burner with a collision-block-type concentrator. Powder ... Two-phase flow measurements of a gas–solid jet downstream of fuel rich/lean burner. ...

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Numerical study on super/hypersonic flow, mixing,

2016-2-18  Three models can well predict the mean velocities of the particle phase. The particle dispersion is over-predicted by the conventional SSF model in the supersonic particle-laden boundary layer flow, while the improved SSF model is less predictable for the particle spatial distribution in the particle-laden strut-injection flow.

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Aspects of computer simulation of liquid-fuelled ...

2012-8-17  Mixing and dispersion of particle ropes in lean phase pneumatic conveying Powder Technology, Vol. 119, No. 2-3 A PDF propagation approach to model turbulent dispersion

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Modelling of volatiles combustion in the lean-phase of a ...

2014-5-12  lean-phase of a calorimetric fluidized bed coal combustor R.G. Bautista-Margulis", R.G. Siddal^ ... the combustion of volatiles is controlled by the mixing of the gaseous ... Using the residence time of the coal particle, r,, and the radial dispersion

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Solids Motion and Mixing SpringerLink

Residence Time Distribution Bottom Zone Solid Motion Solid Circulation Rate Lean Phase ... (1986) A novel method for the investigation of particle mixing in gas-solid systems. Powder Technology, 48, 173 ... Wei, F., Wang, Z., Jin, Y., Yu, Z. and Chen, W. (1994) Dispersion of lateral and axial solids in a cocurrent downflow circulating fluidized ...

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Harun Bilirgen, Ph.D. - General Manager - TABi

Mixing and dispersion of particle ropes in lean phase pneumatic conveying ... The objective of this study was to investigate mixing mechanisms in lean phase pneumatic

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[PDF] Combining Advanced Turbulent Mixing and

Abstract : This work is focused on the development of computational models for the simulation of blast waves, heterogeneous combustion and their interaction with particle dispersion. In particular, a novel Eulerian-Lagrangian (EE/EL) hybrid approach is combines a hybrid Eulerian and Lagrangian framework for dense loading of particles. The Eulerian approach (EE) tracks particles in the dense ...

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Wang Bing-清华大学航天航空学院

2021-3-9  Wang B.*, 2010, “Inter-phase interaction in a turbulent, vertical channel flow laden with heavy particles Part I: Numerical methods and particle dispersion properties,” International Journal of Heat and Mass Transfer, Vol. 53(11-12), pp. 2506-2521.

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[PDF] Computational Modelling of Particle

The aim of this paper is to develop a mathematical model with the ability to predict particle degradation during dilute phase pneumatic conveying. A numerical procedure, based on a matrix representation of degradation processes, is presented to determine the particle impact degradation propensity from a small number of particle single impact tests carried out in a new designed laboratory scale ...

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Numerical study on super/hypersonic flow, mixing,

2016-2-18  Three models can well predict the mean velocities of the particle phase. The particle dispersion is over-predicted by the conventional SSF model in the supersonic particle-laden boundary layer flow, while the improved SSF model is less predictable for the particle spatial distribution in the particle-laden strut-injection flow.

Get price

Modelling of volatiles combustion in the lean-phase of a ...

2014-5-12  lean-phase of a calorimetric fluidized bed coal combustor R.G. Bautista-Margulis", R.G. Siddal^ ... the combustion of volatiles is controlled by the mixing of the gaseous ... Using the residence time of the coal particle, r,, and the radial dispersion

Get price

Solids Motion and Mixing SpringerLink

Residence Time Distribution Bottom Zone Solid Motion Solid Circulation Rate Lean Phase ... (1986) A novel method for the investigation of particle mixing in gas-solid systems. Powder Technology, 48, 173 ... Wei, F., Wang, Z., Jin, Y., Yu, Z. and Chen, W. (1994) Dispersion of lateral and axial solids in a cocurrent downflow circulating fluidized ...

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Harun Bilirgen, Ph.D. - General Manager - TABi

Mixing and dispersion of particle ropes in lean phase pneumatic conveying ... The objective of this study was to investigate mixing mechanisms in lean phase pneumatic

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Modeling of Char Hold-up and Char Particle Size ...

2001-5-9  The particle sized distribution (PSD) of the char ac- ... Second, mixing of the solids and the gas phase has to be quantified, and, finally the com-178 bustion process itself, i.e. the reaction kinetic, has to be modeled. Employing the information ... subdivided into an up-flowing lean suspension (lean phase) and descending clusters (dense

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The elements and richness of particle diffusion during ...

lous diffusion may influence particle mixing, particle size segregation and rheological behavior (Utter and Behringer, 2004). In the case of sediment transport, the presence of anomalous versus normal diffusion bears on formulations of transport rates and particle dispersion (Schumer et al.,

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[PDF] Combining Advanced Turbulent Mixing and

Abstract : This work is focused on the development of computational models for the simulation of blast waves, heterogeneous combustion and their interaction with particle dispersion. In particular, a novel Eulerian-Lagrangian (EE/EL) hybrid approach is combines a hybrid Eulerian and Lagrangian framework for dense loading of particles. The Eulerian approach (EE) tracks particles in the dense ...

Get price

J. Fluid Mech. (2017), . 827, pp. doi:10.1017/jfm.2017.495 ...

influenced by the dispersed phase), whereas in dilute regions (i.e. the far field of the spray nozzle), momentum transfer into the carrier phase is negligible (i.e. one-way coupling). The other important parameter in the dispersion process is the evaporative nature of the liquid phase (as in combustion applications). In evaporating droplets,

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[PDF] Computational Modelling of Particle

The aim of this paper is to develop a mathematical model with the ability to predict particle degradation during dilute phase pneumatic conveying. A numerical procedure, based on a matrix representation of degradation processes, is presented to determine the particle impact degradation propensity from a small number of particle single impact tests carried out in a new designed laboratory scale ...

Get price

Computational Modelling of Particle Degradation in

2003-6-18  The aim of this paper is to develop a mathematical model with the ability to predict particle degradation during dilute phase pneumatic conveying. A numerical procedure, based on a matrix representation of degradation processes, is presented to determine the particle impact degradation propensity from a small number of particle single impact ...

Get price
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