ID 396

Effect of inlet gas turbulence on air-blast atomization

 

Abstract:

Air-blast atomization is an effective approach to generate fine sprays and thus is widely used in a wide variety of applications such as aircraft, marine, and gas turbines. The atomization of the liquid stream is assisted by a co-flowing high speed gas stream. Recent experiments have shown that the turbulence intensity of the injected gas stream has a significant impact on the instability of the gas-liquid interface, which in turn influence the spray formation downstream. In this paper, we performed direct numerical simulations of air-blast atomization. The volume-of-fluid method is used to resolve the gas-liquid interface. The multiphase flow solver "PARIS-Simulator" is used for the simulation. A parametric study is conducted to investigate the effect of the turbulence intensity of the gas inlet. The digital filter-based algorithm is used to generate time and spatially correlated turbulence at the gas inlet. Numerical results of the spray and turbulence statistics will be presented and discussed.