COMPORTAMIENTO DEL FLUJO EN UN SEPARADOR TIPO LAVADOR MEDIANTE SIMULACIÓN NUMÉRICA

Abstract

In the present work a 3D numerical simulation of a venturi scrubber was carried out using the Fluent 12.1 software. Simulations were performed using different Reynolds number air (1.37x105, 2.09x105, 2.45x105 y 2.81x105), and two Reynolds numbers water (58.13 y 169.91). The air flow was simulated in four geometries that they were gotten variating the angles of convergence and divergence from 5 ° to 17 °, keeping the inlet diameter and throat diameter of 250 mm and 125 mm, respectively. The two-phase flow was simulated in a scrubber with an inlet diameter of 250 mm and a throat diameter of 125 mm, with a convergence angle of 17° and a divergence angle of 5°. The simulation results were validated using experimental data obtained by other researchers; they made pressure drop measurements all through venturi scrubber. As the air flow speed contours show that the maximum speed in the washer is not affected by changes in the angles of convergence and divergence. However, the angle change in the diverging section has a greater effect in changing the distribution of pressure in the diverging section when compared with changes in the distribution of pressure in the convergence section caused by the convergence angle change. Then, the geometries that had the same divergence angle had a very similar total pressure drop. On the other hand, it was observed that the maximum velocity value for two-phase flow is not affected by the water flow change. The representative velocity profile for the two-phase flow in the diverging section is more uniform when compared to single-phase flow.