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Multiphase Science and Technology

年間 4 号発行

ISSN 印刷: 0276-1459

ISSN オンライン: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

Indexed in

GROUP COMBUSTION IN SPRAY FLAMES

巻 11, 発行 1, 1999, pp. 1-18
DOI: 10.1615/MultScienTechn.v11.i1.10
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要約

Experiments as well as theoretical and numerical work indicate that spray burning is most often controlled by collective effects. The burning of a single droplet is seldom observed in practical situations whilst there are many examples of combustion of groups of droplets. In such circumstances the droplets vaporize collectively and combustion takes place in a flame located around the cloud. Group combustion is widespread and constitutes a central problem. This is illustrated in this article by a set of examples of fundamental and practical nature. In the first case we consider the structure of a laminar spray flame formed in a counterflow. This stagnation point flame is remarkably stable and may be studied in great detail. The flame structure features a vaporization front and a reactive front separated by a small distance typifying group combustion behavior in the simplest geometry. In the second case we consider the ignition of a dense droplet cloud in a hot oxidizing atmosphere. A model of this configuration assuming droplet group vaporization reveals the possible ignition regimes and provides a description of the dynamics of the process. In the third example, the spray is formed by a shear coaxial injector fed with liquid oxygen and gaseous hydrogen. The flame established in this configuration has been extensively studied with a variety of optical diagnostics and image processing techniques. The data indicate that a highly corrugated flame surrounds the dense spray of droplets formed by the liquid core break-up. Because the flame is turbulent, the mean flame appears as a thick shell shrouding the LOX spray and oxygen vapor.

によって引用された
  1. Fran ois F, Garnier J, Cubizolles G, A new data acquisition system for binary random signal application in multiphase flow measurements, Measurement Science and Technology, 14, 7, 2003. Crossref

  2. KHOSID S., TAMBOUR Y., Analytic study of developing flows in a tube laden with non-evaporating and evaporating drops via a modified linearization of the two-phase momentum equations, Journal of Fluid Mechanics, 603, 2008. Crossref

  3. Reveillon J., Pera C., Bouali Z., Examples of the Potential of DNS for the Understanding of Reactive Multiphase Flows, International Journal of Spray and Combustion Dynamics, 3, 1, 2011. Crossref

  4. Sirignano William A., Advances in droplet array combustion theory and modeling, Progress in Energy and Combustion Science, 42, 2014. Crossref

  5. Bouali Zakaria, Pera Cecile, Reveillon Julien, Numerical analysis of the influence of two-phase flow mass and heat transfer on n-heptane autoignition, Combustion and Flame, 159, 6, 2012. Crossref

  6. Yi Fei, Axelbaum Richard L., Stability of spray combustion for water/alcohols mixtures in oxygen-enriched air, Proceedings of the Combustion Institute, 34, 1, 2013. Crossref

  7. Reveillon Julien, Direct Numerical Simulation of Sprays: Turbulent Dispersion, Evaporation and Combustion, in Multiphase Reacting Flows: Modelling and Simulation, 492, 2007. Crossref

  8. Vicentini M., Lecourt R., Rouzaud O., Bodoc V., Simonin O., Experimental investigation of spray combustion regimes in aeroengine combustors, Progress in Propulsion Physics – Volume 11, 2019. Crossref

  9. Rahman Mustafa Mutiur, Saieed Ahmed, Khan Muhammad Fasahat, Hickey Jean-Pierre, Group Combustion of Dispersed Spherical Core–Shell Nanothermite Particles, Thermo, 2, 3, 2022. Crossref

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