Aiaa 99-0333 Temporal Properties of Multimode Secondary Droplet 5reakup
نویسندگان
چکیده
Secondary drop breakup due to shockwave disturbances was studied for the multimode breakup regime, emphasizing the tempera1 evolution of breakup. Measurements were carried out in a shock tube using pulsed shadowgraphy and holography to observe the mechanism and outcome of breakup. Test conditions involved liquid/gas density ratios greater than 500, Ohnersorge numbers less than 0.1 and Weber numbers in the range 15-80. The evolution of breakup properties begins with the appearance of a plume droplet at small Weber numbers, the development of plume-like structures due to partial transition into a parent drop and a ligament system at large Weber numbers as the shear breakup regime is approached. Measurements over the test range provided drop sizes, drop velocities and liquid removal rates as a function of time and Weber number in the multimode regime.
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