Low-pressure twin-fluid atomization: Effect of mixing process on spray formation

Zaremba M, Weiß L, Maly M, Wensing M, Jedelsky J, Jicha M (2017)

Publication Type: Journal article

Publication year: 2017


Book Volume: 89

Pages Range: 277-289

DOI: 10.1016/j.ijmultiphaseflow.2016.10.015


The present work comparably examines four different twin-fluid atomizers operated under the same operating conditions. Spray formation was examined by several approaches. The internal flow pattern was estimated using a simplified analytical approach, and the results were supported by the observation of the liquid discharge in the near-nozzle region. A high-speed back illumination was used for visualisation of the primary breakup. In the region of fully developed spray, the dynamics of droplets was studied using a phase-Doppler analyser (PDA). The information obtained from all methods was then correlated. Results show that the spray formation process depends mainly on the internal design of twin-fluid atomizer at low gas to liquid ratios (GLR). The amount of gas influences the character of the internal two-phase flow, a mechanism of the liquid breakup, droplet dynamics and a resulting drop size distribution. Differences among the atomizers are reduced with the increase in GLR. Moreover, it was shown that a certain mixing process can inherently create the annular internal flow which generates a stable spray characterized by relatively low mean droplet size.

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Zaremba, M., Weiß, L., Maly, M., Wensing, M., Jedelsky, J., & Jicha, M. (2017). Low-pressure twin-fluid atomization: Effect of mixing process on spray formation. International Journal of Multiphase Flow, 89, 277-289. https://dx.doi.org/10.1016/j.ijmultiphaseflow.2016.10.015


Zaremba, Matous, et al. "Low-pressure twin-fluid atomization: Effect of mixing process on spray formation." International Journal of Multiphase Flow 89 (2017): 277-289.

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