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Contenu archivé le 2022-12-23

Spray aerodynamic interaction

Objectif



Most of the fuels employed in heat engines and industrial furnaces are liquids that must be well atomized before being injected into the combustion zone. This proposal concerns to a method for treating the fuel flow with gas bubbles to improve the spray atomization quality and to increase the combustion efficiency.
The basic feature of the proposed method is the possibility to change the gas bubble radius Rg independently of the gas void fraction a' It seems that such a "perforated" fuel spray would be easily broken and very high atomization quality could be achieved.
The method can be easily applied at comparative low injection pressure, in the cases of steady sprays like the ones used in burners and furnaces. The method and the device may also be used for unsteady injection, e.g. in-cylinder air-assisted fuel injection in 2-stroke ICE. The main task of the proposal will be too obtain empirical equations for calculation of the mean droplet diameters and distribution parameter q in terms of bubble radius Rg and void fraction a'. A check for an application of the method to the case of an intermittent injection will help to determine the field of application of the method, as a second task.
Regarding experimental techniques, droplets will be collected on slides for experimental investigation of the fuel atomization quality. The information concerning the mean air bubble radius will be obtained using a calculation method based on the bubbles rising velocity through stagnant liquid.
The proposed research will lead to improved understandinq of the effect of the air-treated fuel flow properties in particular the air bubble radius Rg and the void fraction a', on the sprav atomization quality. The study of these kind of treated fuel sprays and their atomization is an extension of the objectives of the original project. The results of this research work will be embodied in the
computer-based calculation method of the original project which will benefit the atomizer design and may be applied to a wide range of industries as well as to engines.

Appel à propositions

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Régime de financement

CSC - Cost-sharing contracts

Coordinateur

UNIVERSIDAD POLITECNICA DE VALENCIA
Contribution de l’UE
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Adresse
14,Campus de Camino de Vera 14
46022 VALENCIA
Espagne

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