关键词: 光滑粒子流体动力学;幂定律模型;雾化;射流;液膜;撞击

Abstract: The atomization process of non-Newtonian liquid with Power Law model has complex interface movement, which is difficult to track accurately with traditional grid-based methods. In order to study the atomization and spray characteristics, the typical problem of two liquid jets impingment and atomization was simulated based on three-dimensional SPH method.Numerical result is obtained with SPH method and the atomization angle shows a good agreement with literature experimental results, and numerical results also capture the breakup process of the sheet to ligaments and the state of ligament-net area, which proves that this method is valid. Through the computation of atomization angle with different jets velocity and impinging angle, it shows that atomization angle increases with the enhancement of jets velocity and impinging angle. Through numerical analysis of the velocity field, several conclusions are drawn. In the area close to impinging point, velocity varies intensively because of the inertia force. In the area apart from impinging point, velocity becomes stable because of viscosity dissipation, however, the magnitude of velocity is less than the initial value.

Key words: Smoothed particle hydrodynamics; Power law model; Atomization; Jets;Liquid sheet;Impingement