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This type of spray nozzle may require more atomizing air and a higher atomizing air pressure drop because the mixing and atomization of liquid takes place outside the nozzle. The liquid pressure drop is lower for this type of nozzle, sometimes drawing liquid into the nozzle due to the suction caused by the atomizing air nozzles (siphon nozzle).
Hollow cone nozzles are best for applications requiring good atomization of liquids at low pressures or when quick heat transfer is needed. These nozzles also feature large and unobstructed flow passages, which provide a relatively high resistance to clogging. Hollow cone nozzles provide the smallest drop size distributions.
The devices using this method to achieve atomization are called as airblast, air-assist, or popularly twin-fluid atomizers. In a Rotary Atomizer, the rotating cup or disc forces the liquid to come out at a very high speed through its rim. [1] [2] The Rotary, Pressure-swirl [3] or Twin-fluid Atomizers [4] are the most common methods for spray ...
When afterburning engines are equipped with a C-D nozzle the throat area is variable. Nozzles for supersonic flight speeds, at which high nozzle pressure ratios are generated, [2] also have variable area divergent sections. [3] Turbofan engines may have an additional and separate propelling nozzle which further accelerates the bypass air.
Ultrasonic spray nozzle technology has been used to create films of indium tin oxide (ITO) in the formation of transparent conductive films (TCF). [9] ITO has excellent transparency and low sheet resistance, however it is a scarce material and prone to cracking, which does not make it a good candidate for the new flexible TCFs.
Pressure drop (Δp) Liquid-to-gas ratio (L/G) Liquid-inlet pressure (p L) Removal efficiency: Applications: Gases: 1.3–7.6 cm of water 0.07–2.70 L/m 3 (0.5–20 gal/1,000 ft 3) 70–2800 kPa 50–90 + % (high efficiency only when the gas is very soluble) Mining industries Chemical process industry Boilers and incinerators Iron and steel ...