Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Atomization and Sprays
Импакт фактор: 1.737 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

Выпуски:
Том 30, 2020 Том 29, 2019 Том 28, 2018 Том 27, 2017 Том 26, 2016 Том 25, 2015 Том 24, 2014 Том 23, 2013 Том 22, 2012 Том 21, 2011 Том 20, 2010 Том 19, 2009 Том 18, 2008 Том 17, 2007 Том 16, 2006 Том 15, 2005 Том 14, 2004 Том 13, 2003 Том 12, 2002 Том 11, 2001 Том 10, 2000 Том 9, 1999 Том 8, 1998 Том 7, 1997 Том 6, 1996 Том 5, 1995 Том 4, 1994 Том 3, 1993 Том 2, 1992 Том 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2020031425
pages 677-707

INFLUENCE OF ENERGY EXCHANGE BETWEEN AIR AND LIQUID STREAMS ON SPRAY CHARACTERISTICS AND ATOMIZATION EFFICIENCY OF WATER-AIR IMPINGING JETS

Y. Xia
School of Engineering, The University of British Columbia, 1137 Alumni Ave, Kelowna, BC V1V 1V7, Canada
L. Khezzar
Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
Yannis Hardalupas
Department of Mechanical Engineering, Imperial College London London, SW7 2AZ, United Kingdom
M. Alshehhi
Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates

Краткое описание

The paper evaluates the interaction between atomization quality and atomization efficiency, of a twin water impinging jets atomizer. Liquid jet breakup length, liquid jets separation distance at the breakup region and spray angles were measured with high speed photography and spatial distributions of mean droplet velocities and diameters and normalized liquid volume flux with phase Doppler particle analyzer (PDPA). The results show that the breakup length decreased and the separation distance of the interacting liquid jets at the geometrical 'impingement' region increased rapidly as air-to-liquid momentum ratio (ALMR) increased and then remained constant for ALMR > 9. Spray angles were different on different planes through the spray and generally decreased with increasing ALMR and were insensitive to liquid jets impingement angle. The spatially-averaged Sauter mean diameter (SMD) of the sprays quantified uniquely the atomization quality and showed, for the first time, that it did not depend on liquid jets impingement angle. The atomization efficiency was quantified from the spatially-averaged SMD, for the first time, according to formalisms of Lefebvre (Lefebvre, A.H., Energy Considerations in Twin-Fluid Atomization, J. Eng. Gas Turbines Power, vol. 114, no. 1, pp. 89-96, 1992) and Pizziol et al. (Pizziol, B, Costa, M., Panao, M.O., and Silva, A., Multiple Impinging Jet Air-Assisted Atomization, Exp. Therm. Fluid Sci., vol. 96, pp. 303-310, 2018). The values of the atomization efficiency of Lefebvre's formalism were around 0.7% of the supplied air kinetic energy, in agreement with the measured energy exchange between the air and liquid streams up to liquid breakup, while the values of Pizziol et al. (2018) were larger.

ЛИТЕРАТУРА

  1. Ashgriz, N., Impinging Jet Atomization, Handbook of Atomization and Sprays: Theory and Applications, New York: Springer Science and Business Media, pp. 685-707, 2011.

  2. Avulapati, M.M. and Ravikrishna, R.V., Experimental Studies on Air-Assisted Impinging Jet Atomization, Int. J. Multiphase Flow, vol. 57, no. 8, pp. 88-101,2013.

  3. Avulapati, M.M. and Ravikrishna, R.V., Experimental Studies on Air-Assisted Atomization of Jatropha Pure Plant Oil, Atomization Sprays, vol. 25, no. 7, pp. 553-569, 2015.

  4. Beck, J.E., Lefebvre, A.H., and Koblish, T.R., Liquid Sheet Disintegration by Impinging Air Streams, Atomization and Sprays, vol. 1, no. 2, pp. 155-170, 1991.

  5. Boden, J.C., Hardalupas, Y., Krenteras, P., and Taylor, A.M.K.P., Spray Characteristics from Free Impinging Air and Liquid Jets, Proc. of the 15th ILASS-Europe, Toulouse, France, 1999.

  6. Collins, T.J., ImageJ for Microscopy, Biotechniques, vol. 43(1 Suppl), pp. 25-30, 2007.

  7. Cossali, E. and Hardalupas, Y., Comparison between Laser Diffraction and Phase Doppler Velocimeter Techniques in High Turbidity, Small Diameter Sprays, Exp. Fluids, vol. 13, no. 6, pp. 414-422, 1992.

  8. Dombrowski, N. and Hooper, P., A Study of the Sprays Formed by Impinging Jets in Laminar and Turbulent Flow, J. FluidMech, vol. 18, no. 3, pp. 392-400, 1964.

  9. Engelbert, C., Hardalupas, Y., and Whitelaw, J.H., Breakup Phenomena in Coaxial Airblast Atomizers, Proc. R. Soc. London, Ser. A, vol. A451, no. 1941, pp. 189-229, 1995.

  10. Eroglu, H., Chigier, N., and Farago, Z., Coaxial Atomizer Liquid Intact Lengths, Phys. Fluids A, vol. 3, no. 2, pp. 303-308, 1991.

  11. Hardalupas, Y., Taylor, A.M.K.P., and Whitelaw, J.H., Velocity and Particle-Flux Characteristics of Turbulent, Particle-Laden Jets, Proc. R. Soc. London, Ser. A, vol. A426, no. 1870, pp. 31-78, 1989.

  12. Hardalupas, Y., Taylor, A.M.K.P., and Whitelaw, J.H., Mass Flux, Mass Fraction and Concentration of Liquid Fuel in a Swirl-Stabilized Flame, Int. J. Multiphase Flow, vol. 20, no. 6, pp. 233-259, 1994.

  13. Inoue, C., Watanabe, T., Himeno, T., and Uzawa, S., Impinging Atomization Enhanced by Microjet Injection-Effect, Mechanism and Optimization, 49th AIAA/ASME/SAE/ASEE Joint Propul. Conf., p. 3705,2013.

  14. Knoll, K.E. and Sojka, P.E., Flat-Sheet Twin-Fluid Atomization of High Viscosity Fluids, Part I: Newtonian Liquids, Atomization Sprays, vol. 2, no. 1, pp. 17-36, 1992.

  15. Lai, W., Shakal, J., and Troolin, D., Accuracy, Resolution and Repeatability of Powersight PDPA and LDV Systems, TSI Technical Note, p. 5001520 (A4), 2013.

  16. Lasheras, J.C. and Hopfinger, E., Liquid Jet Instability and Atomization in a Coaxial Gas Stream, Annu. Rev. Fluid Mech, vol. 32, no. 1, pp. 275-308,2000.

  17. Lefebvre, A.H., Energy Considerations in Twin-Fluid Atomization, J. Eng. Gas Turbines Power, vol. 114, no. 1,pp. 89-96, 1992.

  18. Leroux, B., Delabroy, O., and Lacas, F., Experimental Study of Coaxial Atomizers Scaling, Part I: Dense Core Zone, Atomization Sprays, vol. 17, no. 5, pp. 381-407,2007.

  19. Panao, M.R.O. and Delgado, J.M.D., Towards the Design of Low Flow-Rate Multijet Impingement Spray Atomizers, Exp. Therm. FluidSci, vol. 58, no. 18, pp. 170-179,2014.

  20. Pizziol, B., Costa, M., Panao, M.O., and Silva, A., Multiple Impinging Jet Air-Assisted Atomization, Exp. Therm. Fluid Sci., vol. 96, pp. 303-310, 2018.

  21. Prabhakaran, P. and Basavanahalli, R., Gas-on-Liquid Impinging Injectors: Some New Results, 49th AIAA/ASME/SAE/ASEE Joint Propul. Conf., p. 3706,2013.

  22. Ramasubramanian, C., Notaro, V., and Lee, J.G., Characterization of Near-Field Spray of Nongelled- and Gelled-Impinging Doublets at High Pressure, J. Propul. Power, vol. 3, no. 6, pp. 1642-1652, 2015.

  23. Sallam, K.A., Aalburg, C., andFaeth, G.M., Breakup of Round Nonturbulent Liquid Jets in Gaseous Cross-flow, AIAA J., vol. 42, no. 12, pp. 2529-2540, 2004.

  24. Schneider, C.A., Rasband, W.S., and Eliceiri, K.W., NIH Image to ImageJ: 25 Years of Image Analysis, Nature Methods, vol. 9, no. 7, p. 671, 2012.

  25. Sommerfeld, M. and Qiu, H.H., Particle Concentration Measurements by Phase-Doppler Anemometry in Complex Dispersed Two-Phase Flows, Exp. Fluids, vol. 18, no. 3, pp. 187-198, 1995.

  26. Spalding, D.B., Combustion and Mass Transfer, 1st ed., Oxford, UK: Pergamon Press, pp. 199-217,1979.

  27. Xia, Y., Khezzar, L., Alshehhi, M., and Hardalupas, Y., Droplet Size and Velocity Characteristics of Water-Air Impinging Jet Atomizer, Int. J. Multiphase Flow, vol. 94, no. 3, pp. 31-43, 2017.

  28. Xia, Y., Alshehhi, M., Hardalupas, Y., and Khezzar, L., Spray Characteristics of Free Air-on-Water Impinging Jets, Int. J. Multiphase Flow, vol. 100, no. 7, pp. 86-103, 2018a.

  29. Xia, Y., Khezzar, L., Alshehhi, M., and Hardalupas, Y., Atomization of Impinging Opposed Water Jets Interacting with Air Jet, Exp. Therm. Fluid Sci., vol. 93, no. 2, pp. 11-22, 2018b.


Articles with similar content:

HEAT TRANSFER DISTRIBUTION DUE TO ARRAYS OF LIQUID SPRAYS IMPINGING ON A CYLINDRICAL SURFACE
International Heat Transfer Conference 9, Vol.3, 1990, issue
D. T. Hughes, C. J. Davenport, A. H. Hobbis
ATOMIZATION OF GEL FUELS USING IMPINGING-JET ATOMIZERS
International Journal of Energetic Materials and Chemical Propulsion, Vol.10, 2011, issue 1
Gabriela Adler, Anat Desyatkov, Benveniste Natan, Oleg Prokopov
ASSESSMENT OF THE DIRECT QUADRATURE-BASED SECTIONAL METHOD OF MOMENTS FOR THE SIMULATION OF EVAPORATING POLYDISPERSE SPRAYS
Atomization and Sprays, Vol.26, 2016, issue 2
W. W. Gumprich, B. Synek, Amsini Sadiki
CHARACTERIZATION OF PROTOTYPE HIGH-PRESSURE SWIRL INJECTOR NOZZLES, PART I: PROTOTYPE DEVELOPMENT AND INITIAL CHARACTERIZATION OF SPRAYS
Atomization and Sprays, Vol.10, 2000, issue 2
Sangmin Choi, Changsoo Jang, Choongsik Bae
EFFECT OF RECESS LENGTH ON THE SPRAY CHARACTERISTICS OF LIQUID-CENTERED SWIRL COAXIAL INJECTORS
Atomization and Sprays, Vol.26, 2016, issue 6
Peng Cheng, Qinglian Li, Zhongtao Kang, Xinqiao Zhang