太原理工大学学报2025，Vol.56Issue(4)：677-686,10.DOI:10.16355/j.tyut.1007-9432.20240406
不同结构内混式抑尘喷嘴雾化特性实验研究
Experimental Study on the Atomization Characteristics of Internal Mixing Dust-Suppression Nozzles with Different Structures
摘要
Abstract
[Purposes]This work is carried out to investigate the impact of different structures on the atomization performances of internal mixing air-assisted atomization nozzles.[Methods]A com-parative analysis of the spray characteristics of three types of internal mixing nozzle was conducted un-der identical initial conditions through particle size analysis instrument and Particle Image Velocimetry(PIV)equipment.Fluent software was used to perform numerical simulations of the nozzles'internal and external spray field jet characteristics.[Results]The study results indicate that as water supply pressure increases,the atomization range,atomization angle,droplet velocity,and droplet size of the internal mixing atomization nozzle all show an increasing trend.The atomization range of the internal mixing nozzle varies with the shape of the spray hole,with the fan-shaped spray hole providing the widest spray coverage and the circular spray hole achieving the farthest range.Nozzles with a longer mixing chamber still achieve a more ideal droplet size under higher gas-liquid pressure ratios.Under the same initial boundary conditions,compared with the fan-shaped nozzle,the nozzle with a circular air cap exit has a higher droplet velocity.The VOF multiphase flow model-derived atomization angle is nearly identical to the experimentally measured atomization angle,validating the simulation results.As revealed by simulation,after entering the mixing chamber of the fan-shaped spray hole nozzle,part of the liquid phase experiences recirculation,causing some large droplets to be pushed to the sides by the compressed air,resulting in a divergent atomization field.In contrast,within the mixing cham-ber of the nozzle with a circular spray hole,the liquid phase,under the action of compressed air,is concentrated in the center,presenting a bundled atomization field.Moreover,near the nozzle,the spray droplet velocity decreases with increasing axial distance,while the droplet size increases with in-creasing axial distance.关键词
内混式喷嘴/空气助力/雾化特性/数值模拟/结构参数Key words
internal mixing atomizing nozzle/air-assist/atomization characteristics/numerical simulation/nozzle structure分类
矿业与冶金引用本文复制引用
邵和,郑沂怡,李文璞,梁忠秋..不同结构内混式抑尘喷嘴雾化特性实验研究[J].太原理工大学学报,2025,56(4):677-686,10.基金项目
国家自然科学基金资助项目(51804210) （51804210）
