Prediction of Mean Droplet Size of a Spray Using a New Energy-Based Model Combined with a CFD Submodel
Publication: Journal of Aerospace Engineering
Volume 31, Issue 5
Abstract
In order to estimate mean droplet size of spray, a theoretical model using the energy conservation law was derived. In this approach, the loss of kinetic energy leads to the occurrence of atomization phenomenon. The derived formulation shows that the mean droplet size is inversely proportional to atomization efficiency and liquid Weber number. This model needs inputs that are provided using a computational fluid dynamics (CFD) submodel independent of the experimental data. To obtain a prediction of the mean droplet size, an estimation of the atomization efficiency and Weber number is mandatory. Thus, to estimate the atomization efficiency and Weber number, the CFD analysis was conducted for the fluid flow inside the injector considering environmental domain. Prediction of the proposed model has close agreement with available experimental data. Parametric investigation was also done to study the effects of some parameters on the mean droplet size. Consequently, the combined model can be applied as a time-saving and simple model to achieve a good prediction for the mean droplet size of spray.
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Published In
Journal of Aerospace Engineering
Volume 31 • Issue 5 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 27, 2017
Accepted: Mar 6, 2018
Published online: May 30, 2018
Published in print: Sep 1, 2018
Discussion open until: Oct 30, 2018
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