Abstract
Annular jet has a larger contact area with the ambient than that of a round jet when the flow rate is same, and also the flow charcteristics can be controlled by coaxial round jet. The authors made clear already the mean and the fluctuating flow characteristics of annular air jet and their control by coaxial round air jet. In this paper the flow characteristics of gas-solid two-phase annular jet and their control using coaxial round air jet are discussed by the numerical and experimental analyses. The numerical analysis was carried out using k-ε turbulent model and two-way method in order to take accout the effects of dispersed phase (fine solid particles) on continuous phase (air). The turbulent charceteristics were evaluated by random simulation.
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