Abstract
Mixture RNG k-ε double-equation turbulence model is applied to study the velocity characteristics of aerated jet flow. The velocities of aerated jet flow under different air concentration are calculated. The results show that improving air concentration of jet flow can accelerate velocity attenuation of jet flow along the axial way. The reason that aeration influenced velocity attenuation of jet flow in this article is that improving air concentration of jet flow can reduce the core length and then accelerate attenuation of axial velocity. The distribution of velocity at specially appointed section is nearly Gaussian distribution and was not influenced by air entrainment prominently. The calculated results of velocity attenuation are in good agreement with those obtained by semi-empirical relationship. It indicates that the numerical simulation can effectively be used to study aerated jet flows.
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