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Spray nozzle
A spray nozzle is a precision device that facilitates dispersion of liquid into a spray. Nozzles are used for three purposes: to distribute a liquid over an area, to increase liquid surface area, and create impact force on a solid surface. A wide variety of spray nozzle applications use a number of spray characteristics to describe the spray.〔Nasr, Yule and Bending, "Industrial Sprays and Atomization", Springer, 2002, ISBN 1-85233-611-0〕
Spray nozzles can be categorized based on the energy input used to cause atomization, the breakup of the fluid into drops.〔Lipp, C.W., Sprays Article, Kirk-Othmer Encyclopedia of Chemical Technology 5th Ed 2005〕〔W.R. Marshall Jr. Atomization and Spray Drying, Am. Inst of Chem Engr. Monograph Series, 1954〕 Spray nozzles can have one or more outlets; a multiple outlet nozzle is known as a compound nozzle.
==Single-fluid nozzle==
Single-fluid or hydraulic spray nozzles utilize the kinetic energy of the liquid to break it up into droplets. This most widely used type of spray nozzle is more energy efficient at producing surface area than most other types. As the fluid pressure increases, the flow through the nozzle increases, and the drop size decreases. Many configurations of single fluid nozzles are used depending on the spray characteristics desired.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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