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Atomization and Sprays
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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2020033430
pages 1-9

FEEDBACK CONTROL OF THE SPRAY LIQUID DISTRIBUTION OF ELECTROSTATICALLY ASSISTED COAXIAL ATOMIZATION

Rodrigo Osuna-Orozco
Department of Mechanical Engineering, University of Washington, Seattle, Washington 98105, USA
Nathanaël Machicoane
Department of Mechanical Engineering, University of Washington, Seattle, WA 98195-2600, USA
Peter D. Huck
Department of Mechanical Engineering, University of Washington, Seattle, Washington 98105, USA
Alberto Aliseda
Department of Mechanical Engineering, University of Washington, Seattle, WA 98195-2600, USA

ABSTRAKT

Electrostatic actuation is used for real-time multiphysics feedback control of two-fluid coaxial atomization. This actuation is added to the modulation of the axial and angular momentum of the turbulent coaxial gas stream, for a total of three actuators to control atomization. We characterize the spray real-time response through optical scattering measurements of radial liquid distribution. We apply principal component analysis on the scattering radial profiles and correlate the first three principal components to the three control inputs. The control algorithm continuously adjusts the three inputs to minimize the difference between a goal radial profile representing the desired spray state and the profile observed in real-time. This real-time multiphysics (gas momentum plus electrostatic repulsion) control on the liquid distribution in a two-fluid coaxial spray is a novel contribution to the archival literature on this technology.

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