Flow, Turbulence and Combustion

, Volume 94, Issue 2, pp 323–338 | Cite as

Investigation of Glycerol Atomization in the Near-Field of a Flow-Blurring Injector using Time-Resolved PIV and High-Speed Visualization

  • Lulin Jiang
  • Ajay K. Agrawal


Glycerol has very high kinematic viscosity and high vaporization and auto-ignition temperatures, but it has been effectively atomized at room temperature by using a novel flow blurring (FB) injector and then cleanly combusted without any combustor hardware modification. The present study qualitatively and quantitatively reveals the details of glycerol atomization in the near field of the FB injector. Time-resolved Particle Image Velocimetry (PIV) with exposure time of 150 ns and image pair acquisition rate of 15 kHz is utilized to probe the glycerol spray at spatial resolution of 16.83 µm per pixel. PIV results describe the droplet dynamics in terms of instantaneous, mean, and root-mean-square (RMS) profiles of the axial velocity. In addition, high-speed imaging (75 kHz) coupled with backside lighting is applied to reveal the glycerol breakup process at spatial resolution of 7.16 µm per pixel and exposure time of 1 µs. Results indicate that the primary breakup by FB atomization or bubble explosions occurs inside the injector and it results in ligaments and droplets at the injector exit. Then, the secondary breakup by Rayleigh-Taylor instability occurs in the near-field of the injector exit where the high-velocity atomizing air stretches the ligaments into thin ligaments that disintegrate into smaller ligaments, and subsequently, into droplets. Thus, within a short distance downstream of the injector exit (<30 mm), most of the glycerol is atomized into fine droplets demonstrating excellent atomization performance of the FB injector.


Spray and droplet combustion Fuel atomization Glycerol Time-resolved PIV High-speed flow visualization 


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  1. 1.
    Kasabov, P., Zarzalis, N., Habisreuther, P.: Experimental study on lifted flames operated with liquid kerosene at elevated pressure and stabilized by outer recirculation. Flow Turbul. Combust. 90, 605–619 (2013)CrossRefGoogle Scholar
  2. 2.
    Stiehl, R., Schorr, J., Krüger, C., Dreizler, A., Böhm, B.: In-cylinder flow and fuel spray interactions in a stratified spray-guided gasoline engine investigated by high-speed laser imaging technique. Flow Turbul. Combust. 91, 431–450 (2013)CrossRefGoogle Scholar
  3. 3.
    Wright, Y.M., Margari, O.N., Boulouchos, K., Paola, G.D., Mastorakos, E.: Experiments and simulations of n-heptane spray auto-ignition in a closed combustion chamber at diesel engine conditions. Flow Turbul. combust 84, 49–78 (2010)CrossRefzbMATHGoogle Scholar
  4. 4.
    Bottone, F., Kronenburg, A., Gosman, D., Marquis, A.: The numerical simulation of diesel spray combustion with LES-CMC. Flow Turbul. Combust. 89, 651–673 (2012)CrossRefGoogle Scholar
  5. 5.
    Bhagwan, R., Habisreuther, P.: An experimental comparison of the emissions characteristics of standard jet A-1 and synthetic fuels. Flow Turbulence Combust. doi: 10.1007/s10494-014-9528-6
  6. 6.
    Raghavan, V., Rajesh, S., Parag, S., Avinash, V.: Investigation of combustion characteristics of biodiesel and its blends. Combust. Sci. Technol. 181, 877–891 (2009)CrossRefGoogle Scholar
  7. 7.
    Pan, K.L., Li, J.W., Chen, C.P., Wang, C.H.: On droplet combustion of biodiesel fuel mixed with diesel/alkanes in microgravity condition. Combust. Flame 156, 101926–1936 (2009)CrossRefGoogle Scholar
  8. 8.
    Park, S.H., Cha, J., Lee, C.S.: Spray and engine performance characteristics of biodiesel and its blends with diesel and ethanol fuels. Combust. Sci. Technol. 183, 802–822 (2011)CrossRefGoogle Scholar
  9. 9.
    Wang, X., Huang, Z., Kuti, O.A., Zhang, W., Nishida, K.: An experimental investigation on spray, ignition and combustion characteristics of biodiesels. Proc. Combust. Inst. 33, 2071–2077 (2011)CrossRefGoogle Scholar
  10. 10.
    Metzger, B.: Glycerol combustion. M.S. Thesis, Mechanical Engineering Department, North Carolina State University (2007)Google Scholar
  11. 11.
    Bohon, M.D., Metzger, B.A., Linak, W.P., King, C.J., Roberts, W.L.: Glycerol combustion and emissions. Proc. Combust. Inst. 33, 2717–2724 (2011)CrossRefGoogle Scholar
  12. 12.
    Quispe, C.A.G., Coronado, C.J.R., Carvalho Jr. J.A., Linak, W.P., King, C.J., Roberts, W.L.: Glycerol: Production, consumption, prices, characterization and new trends in combustion. Renew Sust. Energ. Rev. 27, 475–493 (2013)CrossRefGoogle Scholar
  13. 13.
    McNeil, J., Day, P., Sirovski, F.: Glycerine from biodiesel: The perfect diesel fuel. Process Saf. Environ. 90, 180–188 (2012)CrossRefGoogle Scholar
  14. 14.
    Queirós, P., Costa, M., Carvalho, R.H.: Co-combustion of crude glycerin with natural gas and hydrogen. Proc. Combust. Inst. 34, 2759–2767 (2013)CrossRefGoogle Scholar
  15. 15.
    Steinmetz, S.A., Herrington, J.S., Winterrowd, C.K., Roberts, W.L., Wendt, J.O.L., Linak, W.P.: Crude glycerol combustion: Particulate, acrolein, and other volatile organic emissions. Proc. Combust. Inst. 34, 2749–2757 (2013)CrossRefGoogle Scholar
  16. 16.
    Simmons, B.M., Agrawal, A.K.: Flow blurring atomization for low-emission combustion of liquid biofuels. Combust. Sci. Technol. 184, 660–675 (2010)CrossRefGoogle Scholar
  17. 17.
    Panchasara, H., Sequera, D., Schreiber, W., Agrawal, A.K.: Combustion performance of a novel injector using flow-blurring for efficient fuel atomization. J. Propul. Power 25, 984–987 (2009)CrossRefGoogle Scholar
  18. 18.
    Sadiki, A., Chrigui, M., Janicka, J., Maneshkarimi, M.R.: Modeling and simulation of effects of turbulence on vaporization, mixing and combustion of liquid-fuel sprays. Flow Turbul. Combust. 75, 105–130 (2005)CrossRefzbMATHGoogle Scholar
  19. 19.
    Lefebvre, A.H.: Airblast atomization. Prog. Energy Comubst. Sci 6, 233–261 (1980)CrossRefGoogle Scholar
  20. 20.
    Simmons, B.M., Panchasara, H.V., Agrawal, A.K.: A comparison of air-blast and flow blurring injectors using phase Doppler particle analyzer techniques. P. ASME Turbo Expo. 2, 981–992 (2009)Google Scholar
  21. 21.
    Pozorski, J., Sazhin, S., Waclawczyk, M., Crua, C., Kennaird, D., Heikal, M.: Spray penetration in a turbulent flow. Flow Turbul. Combust. 68, 153–165 (2002)CrossRefzbMATHGoogle Scholar
  22. 22.
    Sovani, S.D., Sojka, P. E., Lefebvre, A.H.: Effervescent Atomization. Prog. Energ. Combust. 27, 483–521 (2001)CrossRefGoogle Scholar
  23. 23.
    Panchasara, H.V., Simmons, B.M., Agrawal, A. K.: Combustion performance of biodiesel and diesel-vegetable oil blends in a simulated gas turbine burner. J. Eng. Gas Turb. Power 131, 1–11 (2009)CrossRefGoogle Scholar
  24. 24.
    Simmons, B.M.: Atomization and combustion of liquid biofuels [dissertation]. Tuscaloosa (AL): University of Alabama at Tuscaloosa (2011)Google Scholar
  25. 25.
    Jiang, L., Agrawal, A.K., Taylor, R.P.: Clean combustion of different liquid fuels using a novel injector. Exp. Therm. Fluid. Sci. 57, 275–284 (2014)Google Scholar
  26. 26.
    Gañán-Calvo, A.M.: Enhanced liquid atomization: From flow-focusing to flow-blurring. Appl. Phys. Lett. 86, 2141–2142 (2005)Google Scholar
  27. 27.
    Agrawal, S.R., Jiang, L., Agrawal, A.K., Midkiff, K.C.: Analysis of two-phase flow inside a transparent fuel injector. 8th U. S. National Combustion Meeting of the Combustion Institute, Salt Lake City, Utah. Paper No. 070HE-0317 (2013)Google Scholar
  28. 28.
    Simmons, B.M., Agrawal, A.K.: Spray characteristics of a flow blurring atomizer. Atomization Spray 20, 821–825 (2010)CrossRefGoogle Scholar
  29. 29.
    Simmons, B.M., Agrawal, A.K.: Drop size and velocity measurements in bio-oil sprays produced by the flow-blurring injector. P. ASME Turbo Expo. 1, 701–710 (2011)Google Scholar
  30. 30.
    Jiang, L., Agrawal, A.K., Taylor, R.P.: High speed visualization and PIV measurements in the near field of spray produced by flow-blurring atomization. Accepted by Proc. ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, Düsseldorf, Germany. ASME Paper GT2014-27199 (2014)Google Scholar
  31. 31.
    Keane, R.D., Adrian, R.J.: Theory of cross-correlation analysis of PIV images. Appl. Sci. Res. 49, 191–215 (1992)CrossRefGoogle Scholar
  32. 32.
    Weber, C.: Disintegration of liquid jets. Z. Angew. Math. Mech. 11, 136–159 (1931)CrossRefzbMATHGoogle Scholar
  33. 33.
    Ohnesorge, W.: Formation of drops by nozzles and the breakup of liquid jests. Z. Angew. Math. Mech. 16, 355–358 (1936)CrossRefGoogle Scholar
  34. 34.
    Lefebvre, A.H.: Atomization and Sprays. Taylor & Francis, NY, USA (1989)Google Scholar
  35. 35.
    Faeth, G.M.: Dynamics of secondary drop breakup- a rate controlling process in dense sprays. Proceedings ILASS-Europe 2002, p. Invited LectureGoogle Scholar
  36. 36.
    Batarseh, F.Z.M.: Spray generated by an airblast atomizer: atomization, propagation and aerodynamic instability. Ph.D Thesis, TU Darmstadt, Germany (2008)Google Scholar
  37. 37.
    Jiang, L., Agrawal, A.K.: Combustion of straight glycerol with/without methane using a fuel-flexible, low-emissions burner. Fuel 136, 177–184 (2014)Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe University of AlabamaTuscaloosaUSA

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