doiSerbia

Measurement of phase interaction in dispersed gas-particle two-phase flow by phase-doppler anemometry

Mergheni Ali Mohamed (CORIA UMR CNRS -Université et INSA de ROUEN, Cedex, France)
Ben Ticha Hmaied (LESTE Ecole Nationale d'Ingénieurs de Monastir, Monastir, Tunisie)
Sautet Jen-Charles (CORIA UMR CNRS -Université et INSA de ROUEN, Cedex, France)
Godard Gille (CORIA UMR CNRS -Université et INSA de ROUEN, Cedex, France)
Ben Nasrallah Sassi (LESTE Ecole Nationale d'Ingénieurs de Monastir, Monastir, Tunisie)

For simultaneous measurement of size and velocity distributions of continuous and dispersed phases in a two-phase flow a technique phase-Doppler anemometry was used. Spherical glass particles with a particle diameter range from 102 up to 212 µm were used. In this two-phase flow an experimental results are presented which indicate a significant influence of the solid particles on the flow characteristics. The height of influence of these effects depends on the local position in the jet. Near the nozzle exit high gas velocity gradients exist and therefore high turbulence production in the shear layer of the jet is observed. Here the turbulence intensity in the two-phase jet is decreased compared to the single-phase jet. In the developed zone the velocity gradient in the shear layer is lower and the turbulence intensity reduction is higher. .

Keywords: phase Doppler anemometry, gas-particle, turbulence