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Atomization and Sprays

Publicado 12 números por año

ISSN Imprimir: 1044-5110

ISSN En Línea: 1936-2684

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Indexed in

FEEDBACK CONTROL OF COAXIAL ATOMIZATION BASED ON THE SPRAY LIQUID DISTRIBUTION

Volumen 29, Edición 6, 2019, pp. 545-551
DOI: 10.1615/AtomizSpr.2019031766
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SINOPSIS

We demonstrate a novel implementation of real-time feedback control on the structure of the spray produced by a two-fluid coaxial atomizer. The ratio of angular to longitudinal gas flow rates, called swirl ratio, as well as the total amount of gas co-flow are used as the actuation at the nozzle. The swirling and swirl-free gas flow rates are individually set by the control algorithm, with the control objective set based on an optical attenuation radial profile that is related to the liquid volume fraction across the spray. We analyzed the liquid volume fraction profiles measured in open loop by means of singular value decomposition and principal component analysis (PCA) and found that the different states of the spray across a wide range of operating conditions can be described with fidelity by three principal components. The control algorithm maps the resulting state PCA projections to the control variables. Real time control of the spray is achieved over a wide range of operating conditions (gas-to-liquid momentum 1-20 and swirl ratios 0-1).

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CITADO POR
  1. Machicoane Nathanael, Ricard Guillaume, Osuna-Orozco Rodrigo, Huck Peter Dearborn, Aliseda Alberto, Influence of steady and oscillating swirl on the near-field spray characteristics in a two-fluid coaxial atomizer, International Journal of Multiphase Flow, 129, 2020. Crossref

  2. Huck P.D., Osuna-Orozco R., Machicoane N., Aliseda A., Spray dispersion regimes following atomization in a turbulent co-axial gas jet, Journal of Fluid Mechanics, 932, 2022. Crossref

  3. Kaczmarek Maxime, Osuna-Orozco Rodrigo, Huck Peter Dearborn, Aliseda Alberto, Machicoane Nathanaël, Spatial characterization of the flapping instability of a laminar liquid jet fragmented by a swirled gas co-flow, International Journal of Multiphase Flow, 152, 2022. Crossref

  4. Osuna-Orozco Rodrigo, Machicoane Nathanael, Huck Peter D., Aliseda Alberto, Effect of electrostatic forcing on coaxial two-fluid atomization, Physical Review Fluids, 7, 7, 2022. Crossref

  5. Fong Kee Onn, Xue Xinzhi, Osuna-Orozco R., Aliseda A., Two-fluid coaxial atomization in a high-pressure environment, Journal of Fluid Mechanics, 946, 2022. Crossref

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