Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
Indexed in
EXPERIMENTAL STUDY OF COAXIAL ATOMIZERS SCALING. PART I: DENSE CORE ZONE
RESUMO
Coaxial injection is a very common system in industrial burners or rocket engines. Theoretical studies involving different hypotheses have been devoted to this subject. Experimental studies have been performed in several individual configurations. Subsequently, many correlations are proposed in the literature. All these expressions do not take into account the same basic quantities, which may be troublesome for injector designers. In the present work, we have performed experiments in a system where both geometry and liquid characteristics could be varied over a wide range. Changes in atomization regimes, liquid core length, and spray angle are especially examined in the present paper. They were estimated using fast shadowgraphy. We show that the momentum flux ratio plays a key role in all these quantities in the dense core zone. Gas flow Reynolds number is also important for disintegration mode classification. Empirical correlations show that liquid's physical properties (viscosity or surface tension) have little influence on the atomization process in the range studied. The Rayleigh instability growth rate model, based on the existence of a shear layer at the interface, seems to be the most suitable in predicting the dense core zone properties, showing that primary atomization in coaxial injectors is essentially ruled by aerodynamic effects.
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Lemaire R., Maugendre M., Schuller T., Therssen E., Yon J., Original use of a direct injection high efficiency nebulizer for the standardization of liquid fuels spray flames, Review of Scientific Instruments, 80, 10, 2009. Crossref
-
Dumouchel Christophe, On the experimental investigation on primary atomization of liquid streams, Experiments in Fluids, 45, 3, 2008. Crossref
-
Charalampous Georgios, Hardalupas Yannis, Taylor Alex, Structure of the Continuous Liquid Jet Core during Coaxial Air-Blast Atomisation, International Journal of Spray and Combustion Dynamics, 1, 4, 2009. Crossref
-
Xiao F., Dianat M., McGuirk J.J., LES of turbulent liquid jet primary breakup in turbulent coaxial air flow, International Journal of Multiphase Flow, 60, 2014. Crossref
-
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-
Odier Nicolas, Balarac Guillaume, Corre Christophe, Moureau Vincent, Numerical study of a flapping liquid sheet sheared by a high-speed stream, International Journal of Multiphase Flow, 77, 2015. Crossref
-
Müller T., Sänger A., Habisreuther P., Jakobs T., Trimis D., Kolb T., Zarzalis N., Simulation of the primary breakup of a high-viscosity liquid jet by a coaxial annular gas flow, International Journal of Multiphase Flow, 87, 2016. Crossref
-
Jadidi Mehdi, Moghtadernejad Sara, Dolatabadi Ali, A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray, Coatings, 5, 4, 2015. Crossref
-
Zhang Qing, Song Xudong, Guo Qinghua, Gong Yan, Hu Chonghe, Yu Guangsuo, Experimental Study on the Atomization and Chemiluminescence Characteristics of Ethanol Flame, Journal of Spectroscopy, 2017, 2017. Crossref
-
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-
Delon Antoine, Cartellier Alain, Matas Jean-Philippe, Flapping instability of a liquid jet, Physical Review Fluids, 3, 4, 2018. Crossref
-
Kumar Abhijeet, Sahu Srikrishna, Liquid jet breakup unsteadiness in a coaxial air-blast atomizer, International Journal of Spray and Combustion Dynamics, 10, 3, 2018. Crossref
-
, Journal of the Japan Institute of Energy, 87, 8, 2008. Crossref
-
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-
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-
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-
Gupta Ajay, Markides Christos N., Autoignition of an n-heptane jet in a confined turbulent hot coflow of air, Experimental Thermal and Fluid Science, 119, 2020. Crossref
-
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-
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-
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-
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-
Poozesh Sadegh, Akafuah Nelson K., Campbell Heather R., Bashiri Faezeh, Saito Kozo, Experimental and Mathematical Tools to Predict Droplet Size and Velocity Distribution for a Two-Fluid Nozzle, Fluids, 5, 4, 2020. Crossref
-
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-
Wang B., Cleary M. J., Masri A. R., Modeling of interfacial flows based on an explicit volume diffusion concept, Physics of Fluids, 33, 6, 2021. Crossref
-
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-
Zhao Hui, Liu Hai-Feng, Xu Jian-Liang, Li Wei-Feng, Cheng Wei, Breakup and atomization of a round coal water slurry jet by an annular air jet, Chemical Engineering Science, 78, 2012. Crossref
-
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-
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-
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-
Gupta Ajay, Guo Hongkun, Zhai Ming, Markides Christos N., Primary atomization of liquid-fuel jets in confined turbulent pipe-flows of air at elevated temperatures, International Journal of Heat and Mass Transfer, 196, 2022. Crossref