Presented are two approaches for coupled simulations of the injector flow with spray formation. In the first approach the two-fluid model is used within the injector for the cavitating flow. A primary breakup model is then applied at the nozzle orifice where it is coupled with the standard discrete droplet model. In the second approach the Eulerian multi-fluid model is applied for both the nozzle and spray regions. The developed primary breakup model, used in both approaches, is based on locally resolved properties of the cavitating nozzle flow across the orifice cross section. The model provides the initial droplet size and velocity distribution for the droplet parcels released from the surface of a coherent liquid core. The major feature of the predictions obtained with the model is a remarkable asymmetry of the spray. This asymmetry is in agreement with the recent observations at Chalmers University where they performed experiments using a transparent model scaled-up injector. The described model has been implemented into AVL FIRE computational fluid dynamics code which was used to obtain all the presented results.
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October 2005
Technical Papers
Coupled Simulations of Nozzle Flow, Primary Fuel Jet Breakup, and Spray Formation
Eberhard von Berg,
Eberhard von Berg
Advanced Simulation Technologies,
AVL List GmbH
, Hans-List Platz-1, A-8020 Graz, Austria
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Wilfried Edelbauer,
Wilfried Edelbauer
Advanced Simulation Technologies,
AVL List GmbH
, Hans-List Platz-1, A-8020 Graz, Austria
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Ales Alajbegovic,
Ales Alajbegovic
AVL Powertrain Engineering, Inc.
, 47519 Halyard Drive, Plymouth, MI 48170-2438
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Reinhard Tatschl,
Reinhard Tatschl
Advanced Simulation Technologies,
AVL List GmbH
, Hans-List Platz-1, A-8020 Graz, Austria
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Martin Volmajer,
Martin Volmajer
Faculty of Mechanical Engineering,
University of Maribor
, Slovenia
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Breda Kegl,
Breda Kegl
Faculty of Mechanical Engineering,
University of Maribor
, Slovenia
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Lionel C. Ganippa
Lionel C. Ganippa
Department of Thermo and Fluid Dynamics,
Chalmers University of Technology
, Gothenburg, Sweden
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Eberhard von Berg
Advanced Simulation Technologies,
AVL List GmbH
, Hans-List Platz-1, A-8020 Graz, Austria
Wilfried Edelbauer
Advanced Simulation Technologies,
AVL List GmbH
, Hans-List Platz-1, A-8020 Graz, Austria
Ales Alajbegovic
AVL Powertrain Engineering, Inc.
, 47519 Halyard Drive, Plymouth, MI 48170-2438
Reinhard Tatschl
Advanced Simulation Technologies,
AVL List GmbH
, Hans-List Platz-1, A-8020 Graz, Austria
Martin Volmajer
Faculty of Mechanical Engineering,
University of Maribor
, Slovenia
Breda Kegl
Faculty of Mechanical Engineering,
University of Maribor
, Slovenia
Lionel C. Ganippa
Department of Thermo and Fluid Dynamics,
Chalmers University of Technology
, Gothenburg, SwedenJ. Eng. Gas Turbines Power. Oct 2005, 127(4): 897-908 (12 pages)
Published Online: April 16, 2004
Article history
Received:
June 13, 2003
Revised:
April 16, 2004
Citation
von Berg, E., Edelbauer, W., Alajbegovic, A., Tatschl, R., Volmajer, M., Kegl, B., and Ganippa, L. C. (April 16, 2004). "Coupled Simulations of Nozzle Flow, Primary Fuel Jet Breakup, and Spray Formation." ASME. J. Eng. Gas Turbines Power. October 2005; 127(4): 897–908. https://doi.org/10.1115/1.1914803
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