Abstract
As reported in the study of Chang et al. (2003), the modulation of the carrier-phase turbulence, that is, the effect of the presence of dispersed phase on the turbulence structure, is heavily dependent on the term of . Nevertheless, very little experimental data on can be found in the literature. In this study, a monodispersed droplet stream, instead of polydispersed spray, is generated using a monosized atomizer. However, the occurrence of breakup or coalescence due to droplet collisions in the stream downgrades the uniformity of droplet size in the downstream. To avoid this, the electrohydrodynamic (EHD) technique is used. Monodispersed droplets can be made toward a rigid body after charging the electrons. When charged droplets move closer, the coulomb force will keep the droplets distant from one another and avoid the occurrence of droplet breakup or coalescence. Measurements of droplets’ velocity and size in a turbulent stream are made using a particle dynamic analyzer (PDA). Quantities of and k can be computed using the measured velocities of both carrier and dispersed phases.
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