|
The nozzle is a key component in the spray , spray , fuel injection , sandblasting process . Nozzle atomization mechanism , analysis of the nozzle atomization method , the droplet formation process , to improve atomization effect for improving the nozzle structure has an important significance . This article introduces a variety of commonly used nozzle structure and atomization mechanism , comparing the advantages and disadvantages of various nozzle on the basis of the proposed a new peeling nozzle structure . Peeling nozzle structure is simple , infinitely adjustable spray volume , spray angle adjustment flexibility , anti-clogging effect of atomization . However , the internal flow of the fluid state of the peeling nozzle is very complex. Atomization process is usually inside the nozzle flow field and the result of the role of outside the nozzle flow field , so the analysis of the nozzle flow field is necessary . In order to understand the flow field inside the nozzle atomization characteristics , the analysis of the flow inside the nozzle state , through the establishment of a numerical model set meshing , boundary and initial conditions , calculate the control parameters , the use of commercial software CFX on peeling inside the nozzle of the gas-liquid two-phase flow , velocity , pressure field simulation study , provide the basis for the the peeling nozzle design and optimization . Found by numerical simulation has been peeling inside the nozzle flow stream shear atomized into fine particles and uniformly dispersed in the gas stream , is formed in the mixing chamber internal gas - liquid mixed flow , forming a primary atomization . When the gas - liquid mixing flow pulses when the discharge nozzle holes , the further expansion of the volume and the same time , high-speed liquid droplets in the effect of the external air stream to produce secondary atomization , and promote the effect of atomization . Mixing chamber since the liquid inside the nozzle has been atomized , the diameter of the nozzle holes can be increased. Therefore, the increase of the diameter of the spray hole , the spray holes can be effectively avoided clogging . Finally, and analysis of the peeling - liquid two-phase nozzle cooling in high temperature flue gas cooling, waste incineration industrial applications in addition to dustfall in addition to the acid tower the spray flue gas purification as well as the mining process . The study showed that : peeling nozzle can be widely applied to almost all of the energy , power , chemical , food , pharmaceutical , ceramic , construction , metallurgy , environmental protection and other industrial fields .
|