Numerical simulation and flow field analysis of a gas-liquid coaxial atomizing nozzle
YANG Xingzhuang
WANG Qing
LI Shixiao
MENG Bo
FANG Yonghao
LUO Gang
Abstract：To investigate the effects of the structure of the gas-liquid coaxial atomizing nozzle,the number of gas channels and the gas-liquid pressure ratio on the atomization flow field inside and out-side the nozzle,a numerical simulation method was adopted for analysis.The two-phase flow model is selected for the VOF model and the turbulence problem is handled through the Realizable and k-εmodels.The gas and liquid inlets of the nozzle are set as the pressure inlet boundary conditions,and the flow field distribution of the inside and outside of the two gas-liquid two axial nozzles is obtained.The research results show that the opening angle of the nozzle cap directly affects the gas-liquid mix-ing velocity.The larger the opening angle,the worse the uniformity of the gas-liquid mixing velocity on both sides of the nozzle outlet.When the number of gas channels increases from 4 to 6 and 8,the contact area between the gas and the liquid increases,making the gas shear on the liquid more uni-form.When the single-phase gas channel pressure is 0.106 MPa(the total gas pressure is 0.64 MPa and the total liquid pressure is 0.32 MPa),the gas-liquid mixing velocity at the nozzle outlet is the largest,the distribution range of the gas-liquid mixing velocity in the Z-axis direction is the widest,and the mixing effect is the best.
Keywords：gas-liquid two-phasenozzle atomizationnumerical simulation
Publication Date：2025-08-25
Online Publishing Date：2025-09-25(First online date of this platform, not the publication date of the document)
Pages：7( 39-45 )