Abstract
The atomization model of the liquid jet injected from a coaxial airblast atomizer was newly proposed. The atomization model is based on the JE technique. The disturbance wave on the liquid jet surface grows according to the linear instability theory, and the droplets detach from the surface wave when the wave amplitude exceeds the critical value. The liquid jet itself disintegrates into a liquid clump when the amplitude of an asymmetric wave exceeds the critical value, and the liquid clump disintegrates again into finer droplets according to the TAB model. The calculated breakup length shows the smaller value compared to the empirical equation, especially at low air velocity. The Sauter's mean diameter calculated from the model almost coincides with the Nukiyama-Tanasawa's equation at high air velocity. However, at low air velocity the calculated mean diameter shows much larger value compared to the equation.
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