A comparative experimental study of turbulent non premixed flames stabilized by a bluff-body burner

Caetano, Nattan Roberto; Silva, Luı́s Fernando Figueira da

doi:10.1016/j.expthermflusci.2015.01.006

Cited by 37 publications

(26 citation statements)

References 46 publications

(66 reference statements)

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“…Based on the results obtained, it is concluded that these mass consistency approaches are suitable for ensuring a mass consistent coupling between the LES and FDF approaches. The next steps will involve further studies of experimental configurations using these mass consistency algorithms for cases involving the combustion of methane-air mixtures [43]. Energy consistency between Eulerian and Lagrangian approaches also corresponds to future work to be carried out.…”

Section: Discussionmentioning

confidence: 99%

“…The maximum CFL number specified is equal to 0.5. The experimental results used as reference here correspond to the first case discussed in [43], which relates to an isothermal situation involving nitrogen in the central jet, and air in the co-flow. The nominal experimental flow conditions are characterised by an air velocity of 4 m/s and a nitrogen jet bulk flow rate, velocity and Reynolds number of 1.9 N m 3 /h, 13.3 m/s and 6060, respectively.…”

Section: Wake Flowmentioning

confidence: 99%

“…The experimental results used as reference Downloaded by [New York University] at 22:55 16 June 2015 for these comparisons are taken from [43]. More specifically, in this work, one particular isothermal flow configuration studied in [43] is simulated numerically, with and without mass consistency techniques, and the corresponding results are compared with each other. The purpose of including these comparisons here is to illustrate the applicability of the mass consistency techniques discussed in previous sections to a more realistic situation.…”

Section: Wake Flowmentioning

confidence: 99%

“…Finally, a synthetic turbulence generator [46] is utilised in order to reproduce the turbulent inlet conditions characterising the flow configuration simulated. The generation of the synthetic turbulence is based on the mean values of velocity and Reynolds tensor components obtained experimentally [43].…”

Section: Wake Flowmentioning

confidence: 99%

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Study of mass consistency LES/FDF techniques for chemically reacting flows

Celis

Silva

2015

Combustion Theory and Modelling

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A hybrid large eddy simulation/filtered density function (LES/FDF) approach is used for studying chemically reacting flows with detailed chemistry. In particular, techniques utilised for ensuring a mass consistent coupling between LES and FDF are discussed. The purpose of these techniques is to maintain a correct spatial distribution of the computational particles representing specified amounts of fluid. A particular mass consistency technique due to Y.Z. Zhang and D.C. Haworth (A general mass consistency algorithm for hybrid particle/finite-volume PDF methods, J. Comput. Phys. 194 (2004), pp. 156-193) and their associated algorithms are implemented in a pressure-based computational fluid dynamics code suitable for the simulation of variable density flows, representative of those encountered in actual combustion applications. To assess the effectiveness of the referenced technique for enforcing LES/FDF mass consistency, two-and three-dimensional simulations of a temporal mixing layer using detailed and reduced chemistry mechanisms are carried out. The parametric analysis performed focuses on determining the influence on the level of mass consistency errors of parameters such as the initial number of particles per cell and the initial density ratio of the mixing layers. Particular emphasis is put on the computational burden that represents the use of such a mass consistency technique. The results show the suitability of this type of technique for ensuring the mass consistency required when utilising hybrid LES/FDF approaches. The level of agreement of the computed results with experimental data is also illustrated.

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Section: Discussionmentioning

confidence: 99%

Section: Wake Flowmentioning

confidence: 99%

Section: Wake Flowmentioning

confidence: 99%

Section: Wake Flowmentioning

confidence: 99%

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Study of mass consistency LES/FDF techniques for chemically reacting flows

Celis

Silva

2015

Combustion Theory and Modelling

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“…The increased demand for energy, without increasing CO 2 emissions and exclusive reliance on finite resources, such as fossil fuels, has made necessary the development of advanced renewable energy technologies [3,4]. Many authors have been conducting research to find solutions for the optimal and quality generation, distribution and use of renewable sources [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Storage Gravitational Energy for Small Scale Industrial and Residential Applications

2019

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Photovoltaic cells produce electric energy in a short interval during a period of low demand and show high levels of intermittency. One of the well-known solutions is to store the energy and convert it into a more stable form, to transform again into electricity during periods of high demand, in which the energy has a higher value. This process provides economic viability for most energy-storage projects, even for the least efficient and most common, such as batteries. Therefore, this paper aims to propose a storage system that operates with gravitational potential energy, considering a small-scale use. The development of this methodology presents the mathematical modeling of the system and compares the main characteristics with other systems. The dimensions of the considered system are 12-m shaft, 5-m piston height, and 4 m of diameter; it presented an energy storage of 11 kWh. Also, it has an efficiency of about 90%, a lifetime of 50 years, and higher storage densities compared to other systems.

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Hydrothermal synthesis of zeolite Y from green materials

et al. 2021

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Several probes have been conducted by the scientific community to reduce emissions of greenhouse gases such as carbon dioxide (CO 2 ). A zeolitic material is capable of CO 2 adsorption with the aid of such technologies. Our present work is to efficiently synthesize zeolite Y with four Si/Al ratios (2.0, 2.5, 3.0, and 3.5) from green materials such as rice husk ash (source of Si) and metakaolin (source of Al). The method for preparing zeolite Y involves hydrothermal synthesis in a hydrodynamic reactor at 120 C temperature, for a reaction time of 24 hours. These synthetic zeolites represent high values for surface area as well as pore volume in micropore range and are compatible with the size of CO 2 molecules. The zeolite Y (with Si/Al ratio 3.5) has an absorption capacity of 3.35 mmol CO 2 /g at (900 kPa) pressure, thereby

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A comparative experimental study of turbulent non premixed flames stabilized by a bluff-body burner

Cited by 37 publications

References 46 publications

Study of mass consistency LES/FDF techniques for chemically reacting flows

Study of mass consistency LES/FDF techniques for chemically reacting flows

Storage Gravitational Energy for Small Scale Industrial and Residential Applications

Hydrothermal synthesis of zeolite Y from green materials

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