Comparison of the Viscous Liquids Spraying by the OIG and the Oil Configurations of an Effervescent Atomizer at Low Inlet Pressures

Open access

Abstract

In this work we studied the influence of the fluid injection configuration (OIG: outside-in-gas, OIL: outside-in-liquid) on the internal flows and external sprays parameters. We sprayed the viscous aqueous maltodextrin solutions (μ = 60 mPa·s) at a constant inlet pressure of the gas and the gas to the liquid mass flow ratio (GLR) within the range 2.5 to 20%. We found that the fluids injection has a crucial influence on the internal flows. The internal flows patterns for the OIG atomizer were the slug flows, the internal flow of the OIL device was annular which led to the significant improvement of the spray quality: Smaller droplets, faster atomization, fewer pulsations.

[1] ABDULKADIR, M., HERNANDEZ-PEREZ, V., LO, S., LOWNDES, I.S., AZZOPARDI, B.J.: Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser, Experimental Thermal and Fluid Science, Volume 68, November 2015, pp. 468-483, ISSN 0894-1777

[2] BAKER, O.: Simultaneous flow of oil and gas, Oil Gas J., 53, 1954, pp. 185–195

[3] BARNEA, D.: A unified model for predicting flow-pattern transitions for the whole range of pipe inclinations, Int. J. Multiphase Flow, 13, 1987

[4] BUCKNER, H.N., SOJKA P.E.: Effervescent atomization of high-viscosity fluids. Part 1: Newtonian liquids, Atomization Sprays, 1, 1991, pp. 239–252

[5] FERREIRA G., GARCÍA J.A., BARRERAS F., LOZANO A., LINCHETA E.: Design optimization of twin-fluid atomizers with an internal mixing chamber for heavy fuel oils, Fuel Process. Technol., 90, 2009, pp. 270–278

[6] JEDELSKY J., JICHA M.: Energy conversion during effervescent atomization, Fuel, Volume 111, September 2013, Pages 836-844, ISSN 0016-2361

[7] LORCHER, M., SCHMIDT, F., MEWES, D.: Flow field and phase distribution inside effervescent atomizers. In: 9th ICLASS 2003, 2003, pp. 12–9.

[8] MANDAL, A., JOG, M.A., XUE, J., IBRAHIM, A.A.: Flow of power-law fluids in simplex atomizers, International Journal of Heat and Fluid Flow, Volume 29, Issue 5, October 2008, pp. 1494-1503, ISSN 0142-727X

[9] 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, pp. 19-31

[10] SCHRÖDER J., KRAUS S., ROCHA B.B., GAUKEL V., SCHUCHMANN H.P.: Characterization of gelatinized corn starch suspensions and resulting drop size distributions after effervescent atomization, J. Food Eng., 105, 2011, pp. 656–662

[11] STÄHLE, P., GAUKEL, V., SCHUCHMANN, H.P.: Influence of mixing chamber length and liquid viscosity on the effervescent atomization of maltodextrin solutions. In: ILASS – Europe, 2013, Chania, Greece

[12] GOGA V., HUČKO B.: Phenomenological Material Model of Foam Solids. In Journal of Mechanical Engineering - Strojnícky časopis, Vol. 65, No. 1, 2015, pp.5-20, ISSN 0039-2472

Journal Information

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 178 176 9
PDF Downloads 74 74 4