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Atomization and Sprays
Editor-in-Chief Europe: Günter Brenn (open in a new tab)
Editor-in-Chief Americas: Marcus Herrmann (open in a new tab)
Редактор-основатель: Norman Chigier (open in a new tab)

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ISSN Печать: 1044-5110

ISSN Онлайн: 1936-2684

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UNSTEADINESS IN EFFERVESCENT SPRAYS

Том 9, Выпуск 1, 1999, pp. 87-109
DOI: 10.1615/AtomizSpr.v9.i1.50
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Краткое описание

The ideal spray theory of Edwards and Marx was used to investigate the dependence of effervescent spray unsteadiness on operating conditions, spatial location, and fluid physical properties. Droplet size, velocity, and arrival time at a particular spray location were measured using a Phase/Doppler Particle Analyzer. The droplet arrival times were used in calculations of interparticle arrival time gaps and interparticle time distribution functions. The spray was determined to be steady (interparticle time distribution function obeying inhomogeneous Poisson statistics) or unsteady (interparticle time distribution function not obeying inhomogeneous Poisson statistics) by comparing experimental and theoretical (steady) interparticle time distribution functions with results reported in terms of the number of deviations between the two. Since the spray was assumed to be a Poisson process, the expected deviation is the inverse of the square root of the number of interparticle events. A chi-square analysis was performed on the discrepancy.
Results demonstrate that all droplet size classes, which range from diameters of 3.2 to 60.4 μm, exhibit unsteady behavior. Stokes number calculations show that the largest droplets are incapable of following the turbulent flow field motions. Gas-phase turbulence can therefore be eliminated as a cause of unsteadiness for those drops. Chi-square calculations demonstrate that the probability for obtaining such results from random fluctuations is less than 0.001. Hence, it is concluded that effervescent atomization is an inherently unsteady process.
Results also indicate that spray unsteadiness is influenced by the air-to-liquid ratio by mass (ALR) and the liquid mass flow rate, depending on the properties of the liquid used in the spray, and that fluid viscosity and surface tension can affect the level of spray unsteadiness only when the spray is operating in the bubbly or intermittent slug regime. For such conditions, the spray is more unsteady when a lower-viscosity or higher-surface-tension fluid is utilized. When using a liquid that has a low viscosity (0.03 kg/m-s) and high surface tension (0.065 kg/s2), a decrease in ALR or liquid mass flow rate causes the spray to be more unsteady. The use of a high-viscosity (0.124 kg/m-s) liquid lessens the effect of operating conditions on spray unsteadiness. Finally, it was found that the spray is more unsteady at its edge, as well as at greater downstream distances.

ЦИТИРОВАНО В
  1. Ghaemi Sina, Rahimi Payam, Nobes David S., Evaluation of StereoPIV Measurement of Droplet Velocity in an Effervescent Spray, International Journal of Spray and Combustion Dynamics, 2, 2, 2010. Crossref

  2. Gadgil Hrishikesh P., Raghunandan B. N., Some features of spray breakup in effervescent atomizers, Experiments in Fluids, 50, 2, 2011. Crossref

  3. Hong Moongeun, Fleck Brian A., Nobes David S., Unsteadiness of the internal flow in an effervescent atomizer nozzle, Experiments in Fluids, 55, 12, 2014. Crossref

  4. Sovani S.D, Sojka P.E, Lefebvre A.H, Effervescent atomization, Progress in Energy and Combustion Science, 27, 4, 2001. Crossref

  5. Fritsching Udo, Droplets and particles in sprays: tailoring particle properties within spray processes, China Particuology, 3, 1-2, 2005. Crossref

  6. Hájek Jiří, Dohnal Miloslav, Vondál Jiří, Broukal Jakub, Analysis of effervescent spray quality for oil-fired furnace application, Clean Technologies and Environmental Policy, 17, 5, 2015. Crossref

  7. Liu Meng, Duan Yufeng, Zhang Tienan, Xu Yiqian, Evaluation of unsteadiness in effervescent sprays by analysis of droplet arrival statistics – The influence of fluids properties and atomizer internal design, Experimental Thermal and Fluid Science, 35, 1, 2011. Crossref

  8. Liu Meng, Duan YuFeng, Zhang TieNan, Evaluation of effervescent atomizer internal design on the spray unsteadiness using a phase/Doppler particle analyzer, Experimental Thermal and Fluid Science, 34, 6, 2010. Crossref

  9. Stähle Philipp, Gaukel Volker, Schuchmann Heike P., Investigation on the Applicability of the Effervescent Atomizer in Spray Drying of Foods: Influence of Liquid Viscosity on Nozzle Internal Two-Phase Flow and Spray Characteristics, Journal of Food Process Engineering, 38, 5, 2015. Crossref

  10. Chanson H., Bubbly flow structure in hydraulic jump, European Journal of Mechanics - B/Fluids, 26, 3, 2007. Crossref

  11. Stratmann A., Wu X., Walzel P., Einfluss der Vorverteilung der Flüssigkeit in einer innenmischenden Zweistoffdüse auf das Sprühverhalten, Chemie Ingenieur Technik, 87, 8, 2015. Crossref

  12. Zaremba Matouš, Mlkvik Marek, Malý Milan, Jedelský Jan, Jícha Miroslav, Dančová Petra, Vít Tomáš, Evaluation of Steadiness and Drop Size Distribution in Sprays Generated by Different Twin-Fluid Atomizers, EPJ Web of Conferences, 92, 2015. Crossref

  13. Schlinge Britta, Schröder Jewe, Gaukel Volker, P. Schuchmann Heike, Walzel Peter, Vergleich von Methoden zur Pulsationsmessung an innenmischenden Zweistoffdüsen, Chemie Ingenieur Technik, 2013. Crossref

  14. Sun Chunhua, Ning Zhi, Lv Ming, Yan Kai, Fu Juan, Time–frequency analysis of acoustic and unsteadiness evaluation in effervescent sprays, Chemical Engineering Science, 127, 2015. Crossref

  15. Jedelsky Jan, Jicha Miroslav, Energy conversion during effervescent atomization, Fuel, 111, 2013. Crossref

  16. Jedelský Jan, Zaremba Matouš, Malý Milan, Jícha Miroslav, Vít Tomáš, Dančová Petra, Novotný Petr, Characteristics of droplet motion in effervescent sprays, EPJ Web of Conferences, 67, 2014. Crossref

  17. Meng Liu, Yu-feng Duan, Analysis of Droplet Arrival Statistics for Droplet Clustering in Effervescent Spray: The Influence of Atomizer Internal Design, 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011. Crossref

  18. Mostafa Abdu, Fouad M., Enayet M., Osman S., Measurements of Spray Characteristics Produced by Effervescent Atomizers, 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2004. Crossref

  19. Sun Chunhua, Ning Zhi, Lv Ming, Yan Kai, Fu Juan, Acoustic performance of effervescent sprays by time–frequency method with different atomizer structures under different operating conditions, International Journal of Multiphase Flow, 82, 2016. Crossref

  20. Zaremba Matouš, Weiß Lukas, Malý Milan, Wensing Michael, Jedelský Jan, Jícha Miroslav, Low-pressure twin-fluid atomization: Effect of mixing process on spray formation, International Journal of Multiphase Flow, 89, 2017. Crossref

  21. Widmann John, Presser Cary, Leigh Stefan, Effect of burst-splitting events on phase Doppler interferometry measurements, 39th Aerospace Sciences Meeting and Exhibit, 2001. Crossref

  22. Sun Chunhua, Ning Zhi, Qiao Xinqi, Lv Ming, Li Yuanxu, Zhao Jin, Wang Xintao, Study on effervescent spray morphology based on internal gas-liquid two-phase flow patterns, European Journal of Mechanics - B/Fluids, 74, 2019. Crossref

  23. Shin Dongyun, Rodrigues Neil S., Bokhart Andrew J., Sojka Paul E., Gore Jay P., Lucht Robert P., Spray Characteristics of Standard and Alternative Aviation Fuels at Cold-start Conditions, AIAA Journal, 59, 12, 2021. Crossref

  24. Zaremba Matouš, Kozák Jiří, Malý Milan, Weiß Lukas, Rudolf Pavel, Jedelský Jan, Jícha Miroslav, An experimental analysis of the spraying processes in improved design of effervescent atomizer, International Journal of Multiphase Flow, 103, 2018. Crossref

  25. Li Genbao, Li Chuqiao, Experimental study on the spray steadiness of an internal-mixing twin-fluid atomizer, Energy, 226, 2021. Crossref

  26. Mlkvik M., Stähle P., Schuchmann H.P., Gaukel V., Jedelsky J., Jicha M., Twin-fluid atomization of viscous liquids: The effect of atomizer construction on breakup process, spray stability and droplet size, International Journal of Multiphase Flow, 77, 2015. Crossref

  27. Xie Jun, Liu Liansheng, Liu Xuanchen, Qu Huiru, Duan Runze, Effect of bubble cutting on spray characteristics and dust control performance in the effervescent atomization, Process Safety and Environmental Protection, 167, 2022. Crossref

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