2022年9月1日 · For an IMTF nozzle (also known as an air blast or an air-assist nozzle), the velocity of the gas is usually much greater than that of the liquid and, as a consequence, the difference in velocity between the two fluids as well as the interactions between these two fluids are the two physical mechanisms that result in the primary atomization of ...

2025年1月5日 · Coaxial air blast atomization is one of the most effective methods of liquid jet atomization. As the liquid and the parallel annular airflow are ejected from the nozzle, the disturbance of the liquid jet surface increase sharply, leading to the enhancement of the momentum exchange between the airflow and the liquid.

2023年3月1日 · This study aims at investigating the influence of turbulence modulation caused by a thread structure on coaxial air-blast atomization by means of high-speed flow visualizations and droplet particle size techniques. The medium in the central channel of an atomizer is water while the annular channel is airflow.

2023年1月1日 · In the present study, 3D modeling of an air blast atomizer is used to see the effect of ALR on liquid atomization inside a flow domain using Eulerian- Lagrangian approach with the help of commercial CFD software ANSYS FLUENT …

2021年3月16日 · Four nozzles have been considered: a baseline nozzle and three modified nozzles (extended, grooved and ringed). The flow in these nozzles has been simulated using different turbulence closure models, including Spalart–Allmaras, variants of k–ε and k–ω and the Reynolds stress model.

2023年5月18日 · Optimal design of nozzle structure is conducive to improving the atomization quality and has important significance for improving the efficiency and stability of the combustor.

An air blast nozzle includes a ring of air swirler vanes therein for producing a first turbulent flow of air therethrough and a turbulence generator located within the air flow...

2020年3月9日 · The spray cooling phenomenon can be described as follows: working fluid is forced through the atomization nozzle where the liquid is broken into numerous tiny droplets due to the pressure. Subsequently, droplets impinge onto a heated surface, forming a thin liquid film upon the surface and taking away heat.

CFD cold-flow analysis results of the air-blast swirl nozzle for the small aircraft engine combustor are shown. Two major recirculation zones are observed near the nozzle. The centerline recirculation zone velocity profile of CFD is compared with the experimental results.

2022年12月15日 · In this study, we develop a ligament-mediated gamma distribution (LMGD) model for coaxial two-fluid air-blast atomization based on cascade breakup and a ligament-mediated spray mechanism that can predict the nonlinear relationship between the drop diameters and drop size distribution at different velocities.