Energy saving design idea of spray nozzle
As a key component in industrial production, the design of spray nozzle directly affects the energy consumption and efficiency of equipment. To achieve energy-saving goals, design optimization can be carried out from the following aspects:
1. Flow field optimization
Flow field characteristics of low Reynolds number nozzles: Due to weak inertial forces and dominant viscous forces, the flow field exhibits laminar or turbulent transition states, with thick boundary layers and common separation and reattachment phenomena. By adjusting geometric parameters such as nozzle inlet shape, throat shape, and outlet shape, the flow field distribution can be improved and jet performance can be enhanced. For example, using a convergent inlet can promote the development of the boundary layer and reduce the separation zone, while using a diffusive outlet can reduce the turbulence intensity of the jet wake.
Surface modification: By applying surface modification measures such as microstructures, coatings, or grooves on the nozzle surface, the interaction between the fluid and the nozzle surface can be altered, promoting flow field stability and jet performance. For example, the use of super hydrophobic coatings can reduce the adhesion of droplets to the nozzle surface and improve the spray uniformity.
2. Intelligence and Control
Sensor integration: pressure, temperature and flow sensors are integrated in the nozzle to monitor the operating status of the nozzle in real time, so as to realize intelligent control and energy saving optimization of the spray process.
Intelligent algorithm: use artificial intelligence algorithm to analyze nozzle operation data, optimize spray parameters, and improve the energy saving efficiency of nozzles.
3. Jet optimization technology
Jet pulse regulation: By periodically changing the jet pressure or flow rate of the nozzle, pulse jet can be generated to improve flow field mixing and jet uniformity.
Computational fluid dynamics simulation: can be used to analyze the internal flow field of nozzles, identify losses and unstable areas in the flow field, and propose optimization measures.
4. Thermal management optimization of nanofluid nozzles
Introduction of Nanofluids: Nanofluids are formed by adding nanoparticles to traditional fluids, which improves thermal conductivity. Understanding the rheological properties of nanofluids is crucial for designing and optimizing nozzles.
Optimization of nozzle geometry parameters: By optimizing nozzle geometry, such as throat diameter and convergence angle, the flow and heat transfer of nanofluids can be improved.
5. Material handling and nozzle design
Liquid outlet diameter: For air flow nozzles used in industrial production, the liquid outlet diameter (inner diameter) should be as large as possible to increase the gas-liquid contact area, thin the liquid film, and facilitate atomization.
