一种紧凑型微雾喷嘴雾化特性的试验研究OA

To address the challenges of lightweight and compact design in current spray devices caused by complex internal flow channel structures,multiple liquid supply pipelines and interfaces,and large space occupation,a nozzle structure design concept based on the integration of the inlet channel,swirl chamber,and orifice was proposed.A compact micro-mist nozzle with a thickness of 5 mm was designed,and an experimental setup for measuring spray characteristics was established to investigate the influence of the compact micro-mist nozzle's geometric structural parameters on atomization characteristics.The research shows that the flow rate and spray angle are significantly affected by the orifice diameter.Increasing the swirl chamber diameter reduces the liquid film breakup length,which is beneficial for achieving the primary atomization process within a shorter distance.At a spray height of 15 mm,the peak axial velocity of the compact micro-mist nozzle is greater than 10 m/s,occurring inside the spray cone.When the swirl chamber diameter is small,the axial velocity proportion of droplets at the spray center is the largest.When the orifice diameter is large,the decay of the axial velocity proportion along the radial direction slows down.The sauter mean diameter of droplets from the compact micro-mist nozzle is less than 40 μm.The droplet size and droplet number density distribution are less affected by the swirl chamber.An increase in orifice diameter results in a 25%increase in the proportion of droplets with a size below 20 μm.This study provides a new approach for achieving integrated and highly compact designs of atomization devices.