This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Cavitation Inside Multi-hole Injectors for Large Diesel Engines and Its Effect on the Near-nozzle Spray Structure
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2006 by SAE International in United States
Annotation ability available
The cavitating flow characteristics inside multi-hole injectors for large Diesel engines have been investigated. Flow imaging obtained inside transparent nozzle replicas using simultaneously two high speed cameras and various illumination light sources has shown that cavitation is formed not only at the hole entrance due to the local pressure drop induced by nozzle inlet geometry, but also inside the volume of nozzle tip just upstream of the injection holes. CFD calculations of the internal nozzle flow have shown that cavitation strings are formed in the areas where large vortical structures are present. Processing of the acquired images has allowed estimation of the mean location and probability of appearance of the cavitating strings in the 3-D space. Parametric studies have also revealed the effect of the needle lift, cavitation number and Reynolds number. Simultaneous imaging of the flow inside the nozzle, the injection holes and the near-nozzle spray structure has revealed the effect of string cavitation on the hole flow structure and the consequent effect on spray cone and deflection angles. Those have been found to vary considerably and in a transient mode in the presence of a string inside inside the hole from which they are injected.
CitationGavaises, M. and Andriotis, A., "Cavitation Inside Multi-hole Injectors for Large Diesel Engines and Its Effect on the Near-nozzle Spray Structure," SAE Technical Paper 2006-01-1114, 2006, https://doi.org/10.4271/2006-01-1114.
- He, L. Ruiz F. Effect of Cavitation on Flow and Turbulence in Plain Orifice for High-Speed Atomization Atomization and Sprays 1995 5 6 569 584
- Kim, J.H. Nishida K. Hiroyasu H. Characteristics of Internal Flow in a Diesel Injection Nozzle Proc. ICLASS 1997 August 18-22 Seul, Korea
- Soteriou, C. Smith M. Andrews R.J. Diesel Injection - Laser Light Sheet Illumination of the Development of Cavitation in Orifices IMechE Paper C529/018/98 1998
- Chaves, H. Obermeier F. Correlation between Light Absorption Signals of Cavitating Nozzle Flow within and outside of the Hole of a Transparent Diesel Injection Nozzle Proc. ILASS-EUROPE 1998 July 6-8 Manchester, UK
- Soteriou, C. Andrews R.J. Smith M. Direct Injection Diesel Sprays and the Effect of Cavitation and Hydraulic Flip on Atomization SAE Paper 950080 1995
- Arcoumanis, C. Badami M. Flora H. Gavaises M. Cavitation in Real-Size Multi-Hole Diesel Injector Nozzles SAE Paper 2000-01-1249 2000
- Arcoumanis, C. Gavaises M. Nouri J.M. Abdul-Wahab E. Horrocks R.W. Analysis of the Flow in the Nozzle of a Vertical Multi Hole Diesel Engine Injector SAE Paper 980811 1998
- Soteriou, C. Andrews R.J. Torres N. Smith M. Kunkulagunta R. Through the Diesel Nozzle Hole - A Journey of Discovery II Proc. ILASS-Europe 2001 September 2-6 Zurich, Switzerland
- Afzal, H. Arcoumanis C. Gavaises M. Kampanis N. Internal Flow in Diesel Injector Nozzles: Modelling and Experiments IMECHE Paper S492/S2/99 1999
- Roth H. Gavaises M. Arcoumanis C. “Cavitation Initiation, Its Development and Link with Flow Turbulence in Diesel Injector Nozzles” SAE Paper 2002-01-0214 , SAE Transactions 2002
- Giannadakis, E. Gavaises M. Roth H. Arcoumanis C. Cavitation Modelling in Single-Hole Diesel Injector Based on Eulerian-Lagrangian Approach Proc. THIESEL International Conference on Thermo- and Fluid Dynamic Processes in Diesel Engines Valencia, Spain 2004
- Gavaises, M. Giannadakis E. Modelling Of Cavitation In Large Scale Diesel Injector Nozzles ILASS 2004 Nottingham, UK 2004
- Patankar SV Spalding BD A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows Int. J. Heat and Mass Transfer 15 1972 1787 1806
- Giannadakis E. ‘Modelling of cavitation in automotive fuel injector nozzles’ Imperial College London, UK 2005