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综合可压缩流场控制方程、κ-ε湍流模型、粒子动力学模型及简化的雾滴-壁面碰撞模型,建立了狭长空间内细水雾射流的数值仿真模型。基于该模型,采用Fluent流体动力学仿真软件对4种不同粒度的细水雾射流进行了数值仿真。结果表明:粒度较大的细水雾在入射初期速度较快,且保持雾化角的能力更强;细水雾在到达壁面后形成的雾化区形态上保持准稳定,呈现出特征鲜明的雾化主流区、横流区、回流区与涡流区,整个雾化区范围向两侧匀速延伸,粒度越小的雾化区延伸速度越快;狭长空间内垂直于射流方向的气流与细水雾射流产生相互影响,气流在远离喷口的雾化区迎风处速度降低,在靠近喷口的背风处形成涡流,雾化区形态沿气流流向发生扭曲。
Based on the compressible flow field control equation, the κ-ε turbulence model, the particle dynamics model and the simplified droplet-wall collision model, a numerical simulation model of the water mist in a narrow space is established. Based on this model, Fluent fluid dynamics simulation software was used to simulate the water mist of four different particle sizes. The results show that the water mist with larger particle size is faster at the initial stage of incidence and retains the atomization angle more strongly. The atomized region formed by the water mist reaching the wall surface is quasi-stable and shows distinctive characteristics Atomization of the mainstream area, the cross-flow area, the backflow area and the eddy current area, the entire area of the atomization zone extends uniformly to both sides, the smaller the particle size of the atomization zone, the faster the extension speed; the narrow space perpendicular to the jet direction of the airflow and water mist Jet interaction, the airflow in the fog away from the nozzle in the windward Department at a reduced speed, near the jet in the leeward at the formation of vortex, atomization zone shape along the flow direction of distortion.