Predictions of breakup length of a liquid sheet emanating from a pressure-swirl (simplex) fuel atomizer have been carried out by computationally modeling the two-phase flow in the atomizer coupled with a nonlinear analysis of instability of the liquid sheet. The volume-of-fluid (VOF) method has been employed to study the flow field inside the pressure-swirl atomizer. A nonlinear instability model has been developed using a perturbation expansion technique with the initial amplitude of the disturbance as the perturbation parameter to determine the sheet instability and breakup. The results for sheet thickness and velocities from the internal flow solutions are used as input in the nonlinear instability model. Computational results for internal flow are validated by comparing film thickness at exit, spray angle, and discharge coefficient with available experimental data. The predictions of breakup length show a good agreement with semiempirical correlations and available experimental measurements. The effect of elevated ambient pressure on the atomizer internal flow field and sheet breakup is investigated. A decrease in air core diameter is obtained at higher ambient pressure due to increased liquid-air momentum transport. Shorter breakup lengths are obtained at elevated air pressure. The coupled internal flow simulation and sheet instability analysis provides a comprehensive approach to modeling sheet breakup from a pressure-swirl atomizer.
Skip Nav Destination
e-mail: Milind.Jog@uc.edu
Article navigation
October 2007
Technical Papers
Nonlinear Breakup Model for a Liquid Sheet Emanating From a Pressure-Swirl Atomizer
Ashraf A. Ibrahim,
Ashraf A. Ibrahim
Department of Mechanical, Industrial, and Nuclear Engineering, 598 Rhodes Hall, P.O. Box 210072,
University of Cincinnati
, Cincinnati, OH 45221
Search for other works by this author on:
Milind A. Jog
Milind A. Jog
Department of Mechanical, Industrial, and Nuclear Engineering, 598 Rhodes Hall, P.O. Box 210072,
e-mail: Milind.Jog@uc.edu
University of Cincinnati
, Cincinnati, OH 45221
Search for other works by this author on:
Ashraf A. Ibrahim
Department of Mechanical, Industrial, and Nuclear Engineering, 598 Rhodes Hall, P.O. Box 210072,
University of Cincinnati
, Cincinnati, OH 45221
Milind A. Jog
Department of Mechanical, Industrial, and Nuclear Engineering, 598 Rhodes Hall, P.O. Box 210072,
University of Cincinnati
, Cincinnati, OH 45221e-mail: Milind.Jog@uc.edu
J. Eng. Gas Turbines Power. Oct 2007, 129(4): 945-953 (9 pages)
Published Online: January 30, 2007
Article history
Received:
August 16, 2006
Revised:
January 30, 2007
Citation
Ibrahim, A. A., and Jog, M. A. (January 30, 2007). "Nonlinear Breakup Model for a Liquid Sheet Emanating From a Pressure-Swirl Atomizer." ASME. J. Eng. Gas Turbines Power. October 2007; 129(4): 945–953. https://doi.org/10.1115/1.2747263
Download citation file:
Get Email Alerts
Blade Excitation Alleviation of a Nozzleless Radial Turbine by Casing Treatment Based on Reduced Order Mode
J. Eng. Gas Turbines Power
Design And Testing of a Compact, Reverse Brayton Cycle, Air (R729) Cooling Machine
J. Eng. Gas Turbines Power
Experimental Study on Liquid Jet Trajectory in Cross Flow of Swirling Air at Elevated Pressure Condition
J. Eng. Gas Turbines Power
Related Articles
Erratum: “Numerical Simulation of Two-Phase Flow in Injection Nozzles: Interaction of Cavitation and External Jet Formation” [ Journal of Fluids Engineering, 2003, 125(6), pp. 963–969 ]
J. Fluids Eng (January,2006)
A Combined Eulerian and Lagrangian Method for Prediction of Evaporating Sprays
J. Eng. Gas Turbines Power (July,2002)
Effects of Opening and Closing Fuel-Injector Valve on Air/Fuel Mixture
J. Eng. Gas Turbines Power (September,2017)
A Comprehensive Model to Predict Simplex Atomizer Performance
J. Eng. Gas Turbines Power (April,1999)
Related Chapters
Antilock-Braking System Using Fuzzy Logic
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
Internal and Near Nozzle Flow Simulations of Gasoline Multi-Hole Injector (ECN Spray G) with Transient Needle Motion
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Source Term Assessments in PSA Level 2 for the Outage Period (PSAM-0168)
Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)