Liquid film model for the flow in a twin-fluid atomization nozzle

doi:10.16511/j.cnki.qhdxxb.2017.26.064

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (11) : 1228-1232. DOI: 10.16511/j.cnki.qhdxxb.2017.26.064

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Liquid film model for the flow in a twin-fluid atomization nozzle

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Abstract

The flow of gas-liquid mixtures in atomization nozzles is generally believed to not be fully developed annular flow but liquid film formation cannot be described accurately by traditional gas-liquid two phase flow models. This paper compares three slip ratio models for annular flow and their predictions of the liquid film thickness and the liquid mass flow rate with experimental data. The non-slip model under predicts the film thickness while the Ishii empirical correlation based on the hypothesis of fully developed annular flow over predicts the film thickness. A slip model was then developed from experimental data based on a non-fully developed annular flow model, the gas-liquid mass flow ratio and the inlet pressure. This model more accurately predicts the flow characteristics and the liquid film thickness in the nozzle than the other models.

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twin-fluid atomization / annular flow / slip ratio / thickness of liquid film

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ZHU Yule, WU Yuxin, FENG Lele, LÜ Junfu. Liquid film model for the flow in a twin-fluid atomization nozzle[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(11): 1228-1232 https://doi.org/10.16511/j.cnki.qhdxxb.2017.26.064

References

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