Influence of rheological properties on air-blast atomization of coal water slurry

•Visualization of viscoelastic CWS air-blast atomization is studied.•The correlations on CWS breakup length and frequency are obtained.•The CWS drop breakup morphology and deformation characteristics are researched. An experimental investigation is conducted to determine the effect of rheological pr...

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Bibliographic Details
Published in:Journal of non-Newtonian fluid mechanics 2014-09, Vol.211, p.1-15
Main Authors: Zhao, Hui, Hou, Yan-Bing, Liu, Hai-Feng, Tian, Xiu-Shan, Xu, Jian-Liang, Li, Wei-Feng, Liu, Yi, Wu, Fu-Yu, Zhang, Jie, Lin, Kuang-Fei
Format: Article
Language:English
Subjects:
Atomization
Coal water slurry
Non-Newtonian fluid
Sprays
Viscoelasticity
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Summary:•Visualization of viscoelastic CWS air-blast atomization is studied.•The correlations on CWS breakup length and frequency are obtained.•The CWS drop breakup morphology and deformation characteristics are researched. An experimental investigation is conducted to determine the effect of rheological properties (viscoelasticity) on the air-blast atomization of coal water slurry. In air-blast atomization, aerodynamic force causes the liquid to deform and breakup. To observe breakup morphology of coal water slurry atomization, a high speed digital camera is used at various operating conditions. In this test, primary atomization is the condition that a cylindrical liquid jet surrounded by a coaxial annular airflow, and secondary atomization is the process that a liquid drop encounters a continuous air jet. The results show that the viscoelasticity of coal water slurry has great influence on the breakup morphology, breakup length, frequency characteristics. The corresponding correlations for these characteristics also are developed.
ISSN:0377-0257
1873-2631
DOI:10.1016/j.jnnfm.2014.06.007