An experimental study of aerated-liquid atomization
Abstract
The performance of an aerated liquid atomizer was investigated under conditions of bubbly flow. Measurements of mean drop size and drop size distribution were made using a laser diffraction technique. A bubble measurement system was developed for measuring the volume mean diameter of the bubbles inside the atomizer during operation. High speed photographs were also taken to aid in the understanding of the device's operation. Photographic results indicate bubble explosions are an important mechanism of atomization and that bubble spacing in the exit orifice of the atomizer is an important factor in the quality of atomization. Stable operation of the atomizer is limited to low gas/liquid mass flow ratios due to a transition to the slug flow regime at higher gas/liquid ratios. Good atomization can be achieved at delivery pressures as low as 68.9 kPa and at gas/liquid mass ratios less than 0.025. The quality of atomization appears to be largely independent of orifice diameter and liquid viscosity.
Degree
Ph.D.
Advisors
Lefebvre, Purdue University.
Subject Area
Mechanical engineering
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