Coupled Simulations of Nozzle Flow, Primary Fuel Jet Breakup, and Spray Formation
| Autor: | Eberhard von Berg, Wilfried Edelbauer, Breda Kegl, Lionel Ganippa, Reinhard Tatschl, Martin Volmajer, Ales Alajbegovic |
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| Rok vydání: | 2004 |
| Předmět: |
Jet (fluid)
Materials science business.industry Turbulence Mechanical Engineering Flow (psychology) Nozzle Energy Engineering and Power Technology Aerospace Engineering Thermodynamics Injector Mechanics Computational fluid dynamics Breakup law.invention Fuel Technology Nuclear Energy and Engineering law business Body orifice |
| Zdroj: | Journal of Engineering for Gas Turbines and Power. 127:897-908 |
| ISSN: | 1528-8919 0742-4795 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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