Numerical Simulation of the Two-Phase Fluid Field in a Gas-Around-Liquid Spray Nozzle

摘要

A new gas-around-liquid spray nozzle (GLSN) was designed, and the two-phase flow fluid field in this nozzle was simulated numerically. Flow characteristics under different structural parameters were obtained by changing the LID ratio of the premixing chamber, incident angle, and inlet pressures. Increasing the LID ratio and incident angle improved flow characteristics such as atomization flow, outlet velocity, and turbulence intensity. The nozzle performed optimally at an LID ratio of 0.5 and incident angle of 60°. The atomization flow decreased with higher gas pressure and increased with higher liquid pressure. The outlet velocity mainly depended on the inlet gas pressure, not on the inlet liquid pressure. These results provide an indication for optimum structures and parameters of the GLSN.