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Spray characleriSlics of Ihree liquids, waler. diesel fue l. and kerosene. sprayed vcnica lly downward in a transparent squared section rube which IS accessed wilh an exhausler> Ihrough Doppler Particle a pressure SWi rl 'lIomizer, have been evaluated b~ means of Phase Ana lyzer (PIDPA) syslem. The experimental apparacus is accessed wilh a lfa ..-erSlOg syslem whic h enables 10 make complele scan. radially and axially, for the spra:-cone. Differenl pressure d ifferenlials across the nozzle are applied \0 study their effeci on sprn:-r charoclerislics. Measurements of drop lei mean diameter, droplet size distribution. droplet mean velocity , liquid volume nux and droplel number density have !xen carried out. Experimental results showed that the droplet size increases and droplet axial mean velocity decreases as the radial distance from spray axis increOlSes. Also, as the axial

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