This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Cavitation in Two-Dimensional Asymmetric Nozzles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 01, 1999 by SAE International in United States
Annotation ability available
Diesel fuel spray characteristics are thought to depend on cavitation inside the fuel injector nozzles. These nozzles are very small and the fuel flow is very fast, making experimental observation very difficult. Numerical simulation of the two-phase flow is hindered by the severe density difference between the liquid and vapor as well as the existence of complex free surfaces. Recent experimental and numerical advances are now permitting visual observation of real-scale cavitating flow and two-dimensional simulation of the cavitating flow. In contrast to past work, we have chosen to study asymmetric nozzle flow. Asymmetry is more representative of real injector geometry than symmetric nozzles and may yield more reproducible results.
Experimental runs of 1 mm long nozzles were made at upstream pressures up to 120 bar with downstream pressures from 1 to 50 bar. Photographs of planar asymmetric nozzles revealed complex transient structures on the fuel-vapor interface. The nature of these structures depended on both the upstream and downstream pressure. Numerical simulation of selected experimental cases predicted nearly identical vapor location. The numerical simulation also provided predictions of the velocity and pressure field. Numerical simulations of a different geometry with an upstream pressure of 1000 bar predicted a strong, chaotic cavity oscillation with a frequency of about 26 to 33 kHz.
|Journal Article||Time-resolved X-ray Tomography of Gasoline Direct Injection Sprays|
|Technical Paper||Evaluation of Pump Design Parameters in Diesel Fuel Injection Systems|
|Technical Paper||Calculation of the Diesel Fuel Injection Parameters|
CitationSchmidt, D., Rutland, C., Corradini, M., Roosen, P. et al., "Cavitation in Two-Dimensional Asymmetric Nozzles," SAE Technical Paper 1999-01-0518, 1999, https://doi.org/10.4271/1999-01-0518.
- Arcoumanis, C. Gavaises M. Nouri J. M. Abdul-Wahab E. Horrocks Roy. W. “Analysis of the Flow in the Nozzle of a Vertical Multi Hole Diesel Engine Injector,” SAE Paper 980811 1998
- Avva, Ram K. Singhal Ashok Gibson Dennis H. “An Enthalpy Based Model of Cavitation.” ASME FED 226 63 70 1995
- Bergwerk, W. “Flow Pattern in Diesel Nozzle Spray Holes,” Proceedings of the Institute of Mechanical Engineers 173 655 660 1959
- Chaves, H. et al. “Experimental Study of Cavitation in the Nozzle Hole of Diesel Injectors Using Transparent Nozzles,” SAE Paper No. 950290 199 211 1995
- Chen, Yongliang Heister Stephen D. “Two-Phase Modeling of Cavitated Flows,” Computers and Fluids 24 7 799 809 1995
- He, Lu Francisco Ruiz “Effect of Cavitation on Flow and Turbulence in Plain Orifices for High-Speed Atomization,” Atomization and Sprays 5 569 584 1995
- Hiroyasu, H. Arai M. Shimizu M. “Break-Up Length of a Liquid Jet and Internal Flow in a Nozzle,” ICLASS-91 Gaithersburg, MD 275 282 July 1991
- Kim, J. H. Nishida K. Hiroyasu H. “Characteristics of the Internal Flow in a Diesel Injection Nozzle,” ICLASS-97 Seoul 1997 175 182
- Knapp, Robert T. Daily James W. Hammitt Frederick G. Cavitation McGraw-Hill 1970
- Kubota, A. Kato H. Yamaguchi H. “Finite Difference Analysis of Unsteady Cavitation on a Two-Dimensional Hydrofoil,” Proc. of the 5th Int. Conf. on Numerical Ship Hydrodynamics Hiroshima 667 683 Sept. 1989
- Poinsot, T. J. Lele S. K. “Boundary Conditions for Direct Simulations of Compressible Viscous Reacting Flows,” J. of Computational Physics 101 104 129 1992
- Roosen, P. Unruh O. Behmann M. “Investigation of cavitation phenomena inside fuel injector nozzles,” ISATA Florence June 1997
- Roosen, P. Unruh O. “Cavitation-induced flow field inside fuel injector nozzles,” ISATA Düsseldorf June 1998
- Schmidt, David P. Rutland C. J. Corradini M. L. “A Numerical Study of Cavitating Flow Through Various Nozzle Shapes,” SAE Paper 971597 1997
- Schmidt, David P. Rutland C. J. Corradini M. L. “A Fully Compressible, Two-Dimensional, Model of Small, High Speed, Cavitating Nozzles,” Atomization and Sprays 1998
- Soteriou, Celia Andrews Richard Smith Mark “Direct Injection Diesel Sprays and the Effect of Cavitation and Hydraulic Flip on Atomization,” SAE Paper No. 950080 27 51 1995
- Strakey, P. A. Olson K. M. Talley D. G. “The Effect of Manifold Cross-Flow on the Discharge Coefficient of Sharp-Edged Orifices,” ILASS-97 Ottawa 200 204 1997
- Thompson, Kevin W. “Time Dependent Boundary Conditions for Hyperbolic Systems,” J. of Computational Physics 68 1 24 1987
- Wallis, Graham, B. One-dimensional Two-phase Flow McGraw-Hill 143 1969
- Zijlema, M. “On the Construction of a Third-Order Accurate Monotone Convection Scheme with Application to Turbulent Flows in General Domains,” Int. J. for Numerical Methods in Fluids 22 619 641 1996