EFFECT OF PARTICLE-SIZE ON A 2-PHASE TURBULENT JET

The effect of particle size on two-phase turbulent jet flow structure is studied in the present experimental investigation. Polystyrene soli d particles of 210, 460, and 780 mum were used. The particles' mass lo ading ratios ranged from 0 to 3.6. The flow Reynolds number was 2 x 10 (4), which was based on the pipe nozzle diameter and the fluid-phase c enterline velocity at the nozzle exit. A two-color laser-Doppler anemo meter (LDA), combined with the amplitude discrimination method and the velocity filter method, was employed for measurement. The measurement range of the jet flow was from the initial pipe exit to 90D downstrea m. Results are presented for the mean velocities of particle and fluid phases, the flow's turbulent intensities and the flow's Reynolds stre sses. The energy spectra and the correlation functions of the two-phas e jet flow were also obtained by using another one-component He-Ne LDA system.