Different types of air atomizing nozzles have been developed so far, and the main types of nozzles commonly used at present are pressure-type, rotary-type, pneumatic and so on.
The study of “air atomizing nozzles” is a classic topic, but also a topic of practical significance.
Research on air atomizing nozzles relies on the development of disciplines such as fluid mechanics, gas dynamics, two-phase fluid dynamics and numerical methods due to the complexity of the atomization process.
Apart from some theoretical studies, the vast majority are experimental.
A variety of different types of nozzles have been developed until now, and the following are the main types of nozzles that are commonly used today:
1. Pressure air atomizing nozzle: spray the liquid through the small hole to realize the conversion of pressure potential energy to kinetic energy, so as to obtain a higher flow speed than the surrounding gas, and realize the atomization of liquid through the role of air-liquid.
2. Rotary air atomizing nozzle: the fluid is thrown out of the tank through the high-speed rotating disc, cup or dumping disk with radial holes to form a liquid film, and the atomization of the liquid is realized under the action of surface tension.
3. Pneumatic air atomizing nozzle: the use of gas media and liquid media between the mutual compression and acceleration of the liquid atomization.
In addition to this, many types of air atomizing nozzles have been developed in the industrial and aeronautical fields, such as electrostatic, impingement, coaxial, and so on.
In fact, not only in the field of combustion, but also in other areas such as fire fighting, chemical, pharmaceutical, surface coating, inkjet printing, etc., atomization has its own significance.
