Numerical Simulation of a Vortex Combustor Based on Aluminum and Steam

Chen, Xianhe; Xia, Zhixun; Huang, Liya; Ma, Likun

doi:10.3390/en9121072

Cited by 7 publications

(23 citation statements)

References 27 publications

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“…A quarter of the combustor is simulated with periodic boundary conditions with the purpose of reducing computational cost. Turbulence effects are demonstrated using the Reynolds stress model with linear pressure–strain approach while considering the strong vortex flow field in the vortex combustor . Moreover, the simulations are conducted under the steady-state conditions.…”

Section: Theorymentioning

confidence: 99%

“…Moreover, the simulations are conducted under the steady-state conditions. Besides, the eddy dissipation model is used to simulate gas phase combustion …”

Section: Theorymentioning

confidence: 99%

“…A simplified combustion model of aluminum particles is obtained from refs and , which can be used for the calculation of the two-phase flow of aluminum particles and its distribution for the complete combustion process. The results of this model are verified using an experiment .…”

Section: Theorymentioning

confidence: 99%

“…The residence time of aluminum in the combustor is increased to allow the aluminum particles to achieve self-sustaining combustion and improve combustion efficiency. Moreover, numerous works have been completed on the vortex combustor, such as the numerical simulation and aluminum particle combustion model . So far, the vortex combustor is the only device that can maintain the continuous and steady combustion of aluminum and water.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Simulation of New Aluminum and Steam Vortex Combustor

et al. 2018

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In this paper, we report experimental research on a vortex combustor for aluminum and steam combustion. High-temperature and high-pressure steam is obtained by combining alcohol with the combustion of oxygen and water, powder from a conventional piston drive, and nitrogen as fluidizing gas. The experimental results show that the vortex combustor can maintain aluminum–steam combustion. However, combustion product deposition is a challenge to the experiment. A new vortex combustor configuration, in which aluminum particles enter the combustor from the end face, is hence proposed, and a numerical simulation is conducted. Results suggest that three vortexing zones exist in the vortex combustor, namely, outer, intermediate, and internal vortex zones. Besides, influencing factors such as the inlet position of aluminum particles and particle size are also studied. The results show that the combustion efficiency was prone to decrease as the aluminum particle inlet position and particle diameter increased.

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Section: Theorymentioning

confidence: 99%

“…Moreover, the simulations are conducted under the steady-state conditions. Besides, the eddy dissipation model is used to simulate gas phase combustion …”

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Simulation of New Aluminum and Steam Vortex Combustor

et al. 2018

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“…In [10], a new type of vortex combustor is proposed to increase the efficiency of the combustion of aluminum and steam, and a mathematical model of the two phases of reacting flow in this combustor is established.…”

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confidence: 99%

Editorial Special Issue “Combustion and Propulsion”

Giorgi

Ficarella

2017

Energies

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The increasing demand for socially and environmentally sustainable development requires appropriate use of energy resources, particularly in the transportation of people and goods. The main source of energy for propulsion is based on the use of fuels, mainly of fossil origin but increasingly produced from renewable sources. Therefore, combustion processes play a key role in the efficiency of energy use and for the environmental impact of transportation systems.The most relevant topic of recent scientific and technological research is the control of the fundamental processes, down to the molecular level, affecting combustion. Therefore, research focuses on the production of fuels from renewable sources, on fuel injection and vaporization, by means of new concepts of atomizers in gas turbines, or by means of injection systems with electronic control and high pressure in internal combustion engines, on air-fuel mixing. Moreover, research focuses on the control of oxidation processes by lean combustion or by new combustion concepts, combustion instabilities, micro-scale combustion, control of turbulence and the boundary layer by means of active systems, and the development of new combustion concepts such as the homogeneous charge compression ignition.Control and diagnostics are influenced by the peculiar characteristics of combustion in propulsion systems, with respect to stationary applications, because of the significant degree of unsteadiness of the operating conditions and the extremely high power density.The present Special Issue focuses on experimental, theoretical, and computational investigations on the fundamentals of combustion in propulsion systems, and on the resulting lines of technological development. The articles cover a wide range of topics, such as combustion in gas turbines and internal combustion engines for aeronautical, automotive, naval and railway engines, chemical space propulsion, control and diagnostics of combustion, new and renewable fuels, alternative combustion-based propulsion systems, new combustion concepts, pollutants formation and control in propulsive systems.Eleven papers have been approved for publication; most of them are related to the reduction and control of pollutants. The formation of pollutants from combustion systems is a topic that attracts considerable interest because of the negative impact on human health, air quality, and climate change. Numerous experimental and numerical efforts have been made in order to achieve a better understanding of the chemistry and physics involved in the pollutant formation process, with the aim of achieving low-emission combustion technologies.In this context, the work of [1] was aimed at obtaining both quantitative and qualitative information of soot particles generated with a set of laminar partially-premixed co-flow flames characterized by different equivalence ratios by an improved version of the thermophoretic particle densitometry (TPD) method. Results also show that increasing the remixing has the initial effect of increasing par...

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Potential of Aluminum as a Metal Fuel for Supporting EU Long‐Term Energy Storage Needs

Barelli,

Trombetti,

Zhang

et al. 2024

Adv Materials Technologies

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The EU's energy transition necessitates availability of green energy carriers with high volumetric energy densities for long‐term energy storage (ES) needs. A fully decarbonized scenario considering renewable energy availability is analyzed underpinning the need for such carriers. Considering the shortcomings of Power‐to‐X technologies in terms of efficiency and low volumetric density, Aluminum (Al) is identified as a potential alternative showing significantly high volumetric energy densities (23.5 kWh L−1). In this paper, an Al‐based long‐term ES concept is investigated, taking advantage of the inherent recycling of the active species (i.e., Al2O3 to Al) coupling decarbonized Hall–Héroult process with an Al‐steam oxidation for simultaneous hydrogen (H2) and heat generation. This work demonstrates an innovative lab‐scale fine Al powder‐steam oxidation process at ≈900 °C without use of catalysts or additives, exploiting alumina as inert material. Conducted SEM‐EDX analysis on oxidized Al provides supporting evidence in favor of employed oxidation pathway, hindering tendency of aluminum oxide (Al2O3) clumping and enabling direct use of oxides in the smelting process for fully recyclability. Moreover, outcomes of XRD analyses are presented to validate the measured total H2 yields.

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Numerical Simulation of a Vortex Combustor Based on Aluminum and Steam

Cited by 7 publications

References 27 publications

Experimental and Numerical Simulation of New Aluminum and Steam Vortex Combustor

Experimental and Numerical Simulation of New Aluminum and Steam Vortex Combustor

Editorial Special Issue “Combustion and Propulsion”

Potential of Aluminum as a Metal Fuel for Supporting EU Long‐Term Energy Storage Needs

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