Although coaxial airblast primary atomization has been studied for decades, relatively little attention has been given to three-stream designs; this is especially true for transonic self-pulsating injectors. Herein, the effects of nozzle geometry, grid resolution, modulation, and gas flow rate on the acoustics and spray character within an industrial scale system were investigated computationally using axisymmetric (AS) and three-dimensional (3D) models. Metrics included stream pressure pulsations, spray lift-off, spray angle, and primary droplet length scale, along with the spectral alignment among these parameters. Strong interactions existed between geometry and inner gas (IG) feed rate. Additionally, inner nozzle retraction and outer stream meeting angle were intimately coupled. Particular attention was given to develop correlations for various metrics versus retraction; one such example is that injector flow capacity was found to be linearly proportional to retraction. Higher IG flows were found to widen sprays, bringing the spray in closer to the nozzle face, and reducing droplet length scales. Substantial forced modulation of the IG at its dominant tone did not strongly affect many metrics. Incompressible 3D results were similar to some of the AS results, which affirmed the predictive power by running AS simulations as surrogates. Lastly, normalized droplet size versus normalized distance from the injector followed a strikingly similar trend as that found from prior two-fluid air-slurry calibration work.
Skip Nav Destination
Article navigation
November 2016
Research-Article
The Influence of Retraction on Three-Stream Injector Pulsatile Atomization for Air–Water Systems
Francine Battaglia
Francine Battaglia
Fellow ASME
Department of Mechanical Engineering,
Virginia Polytechnic Institute and State University,
Blacksburg, VA 24061
e-mail: fbattaglia@vt.edu
Department of Mechanical Engineering,
Virginia Polytechnic Institute and State University,
Blacksburg, VA 24061
e-mail: fbattaglia@vt.edu
Search for other works by this author on:
Wayne Strasser
Francine Battaglia
Fellow ASME
Department of Mechanical Engineering,
Virginia Polytechnic Institute and State University,
Blacksburg, VA 24061
e-mail: fbattaglia@vt.edu
Department of Mechanical Engineering,
Virginia Polytechnic Institute and State University,
Blacksburg, VA 24061
e-mail: fbattaglia@vt.edu
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 3, 2015; final manuscript received April 5, 2016; published online July 15, 2016. Assoc. Editor: Samuel Paolucci.
J. Fluids Eng. Nov 2016, 138(11): 111302 (12 pages)
Published Online: July 15, 2016
Article history
Received:
August 3, 2015
Revised:
April 5, 2016
Citation
Strasser, W., and Battaglia, F. (July 15, 2016). "The Influence of Retraction on Three-Stream Injector Pulsatile Atomization for Air–Water Systems." ASME. J. Fluids Eng. November 2016; 138(11): 111302. https://doi.org/10.1115/1.4033421
Download citation file:
Get Email Alerts
Experimental Investigation of the Effect of Rake on a Bluff Body Equipped With a Diffuser
J. Fluids Eng (April 2025)
Related Articles
Identification of Pulsation Mechanism in a Transonic Three-Stream Airblast Injector
J. Fluids Eng (November,2016)
Key Parameters for the Performance of Impaction-Pin Nozzles Used in
Inlet Fogging of Gas Turbine Engines
J. Eng. Gas Turbines Power (April,2007)
Experimental Study of Water Sprays for the Attenuation of Fire Thermal Radiation
J. Heat Transfer (June,2001)
A Comparative Study of Cooling of High Power Density Electronics Using Sprays and Microjets
J. Heat Transfer (January,2005)
Related Proceedings Papers
Related Chapters
Straight-Stream Nozzle Models to Support Aerial Applications
Pesticide Formulation and Delivery Systems: 42nd Volume, Building the Future of Agrochemicals for 2030 and Beyond
Research Protocol for Approval of Drift-Reducing Adjuvants for Dicamba in Brazil
Pesticide Formulation and Delivery Systems: 42nd Volume, Building the Future of Agrochemicals for 2030 and Beyond
Antilock-Braking System Using Fuzzy Logic
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3