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Atomization and Sprays

Publication de 12  numéros par an

ISSN Imprimer: 1044-5110

ISSN En ligne: 1936-2684

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ON THE INFLUENCE OF INTERNAL FLOW STRUCTURE ON PERFORMANCE OF PLAIN-ORIFICE ATOMIZERS

Volume 11, Numéro 4, 2001, pp. 335-350
DOI: 10.1615/AtomizSpr.v11.i4.30
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RÉSUMÉ

A series of parametric simulations was conducted to investigate the unsteady internal flow behavior in plain orifice, or “pressure” atomizers. The unsteady behavior is attributed to instabilities in the vena contracta and the presence of cavitation in this region. Even though the present calculations are laminar, they exhibit turbulent-like characteristics due to this instability. Orifice mass flow is shown to be periodic in most instances with fluctuations occurring at frequencies consistent with the orifice transit time. Cavitation is shown to enhance fluctuations, in some cases quite dramatically. Results are presented for a range of flow conditions and orifice geometries.

CITÉ PAR
  1. Park Hongbok, Yoon Sam S., Heister Stephen D., A nonlinear atomization model for computation of drop size distributions and spray simulations, International Journal for Numerical Methods in Fluids, 48, 11, 2005. Crossref

  2. MacDonald Megan E., Canino James V., Heister Stephen D., Nonlinear Response of Plain-Orifice Injectors to Nonacoustic Pressure Oscillations, Journal of Propulsion and Power, 23, 6, 2007. Crossref

  3. Yoon Changjin, Heister Stephen D., Xia Guoping, Merkle Charles L., Numerical Modeling of Injection of Shear-Thinning Gel Propellants Through Plain-Orifice Atomizer, Journal of Propulsion and Power, 27, 5, 2011. Crossref

  4. Xu Changhai, Heister Stephen D., Field Robert, Modeling Cavitating Venturi Flows, Journal of Propulsion and Power, 18, 6, 2002. Crossref

  5. Tanner Franz X., A Cascade Atomization and Drop Breakup Model for the Simulation of High-Pressure Liquid Jets, SAE Technical Paper Series, 1, 2003. Crossref

  6. Park Hongbok, Heister Stephen D., A numerical study of primary instability on viscous high-speed jets, Computers & Fluids, 35, 10, 2006. Crossref

  7. Heister Stephen, Xia Guoping, Merkle Charles L., Numerical Modeling of Injection of Shear-Thinning Gel Propellants Through Plain-Orifice Atomizer, Journal of Propulsion and Power, 27, 5, 2011. Crossref

  8. Vahedi Tafreshi H., Pourdeyhimi B., Simulating Cavitation and Hydraulic Flip Inside Hydroentangling Nozzles, Textile Research Journal, 74, 4, 2004. Crossref

  9. Begenir A., Tafreshi H. Vahedi, Pourdeyhimi B., Effect of Nozzle Geometry on Hydroentangling Water Jets: Experimental Observations, Textile Research Journal, 74, 2, 2004. Crossref

  10. MacDonald Megan, Canino James, Heister Stephen, Nonlinear Response Functions of Drilled Orifice Injectors, 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006. Crossref

  11. Heister S. D., Plain Orifice Spray Nozzles, in Handbook of Atomization and Sprays, 2011. Crossref

  12. Xu Changhai, Heister Stephen D., Collicott Stephen H., Yeh Che-Ping, Modeling Cavitating Venturi Flows, 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2002. Crossref

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