In order to obtain an appreciable effect of extinction of the heat from a heat source (eg a fire) it is necessary that the water flows are high (20- 30 liters per minute) and the droplet diameters are between 20 and 100 microns. To achieve both of these two features the type of nozzle to be used has to be multi hole and supply pressures have to exceed 80 bars. In these conditions there are strong interactions between the individual holes - that generate particular phenomena such as the air entrainment - and the generation of areas where the drops tend to stagnate. To understand the physics of this second phenomenon, the interaction of two sprays is studied in this paper. The article focuses on the region of interaction between the two sprays, which is characterized by using a PDPA system.

Characterization of Two Sprays Interacting

AMORESANO, AMEDEO;DE NICOLA, CARLO;DE DOMENICO, FRANCESCO
2012

Abstract

In order to obtain an appreciable effect of extinction of the heat from a heat source (eg a fire) it is necessary that the water flows are high (20- 30 liters per minute) and the droplet diameters are between 20 and 100 microns. To achieve both of these two features the type of nozzle to be used has to be multi hole and supply pressures have to exceed 80 bars. In these conditions there are strong interactions between the individual holes - that generate particular phenomena such as the air entrainment - and the generation of areas where the drops tend to stagnate. To understand the physics of this second phenomenon, the interaction of two sprays is studied in this paper. The article focuses on the region of interaction between the two sprays, which is characterized by using a PDPA system.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/510413
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