Transient Simulation of DGI Engine Injector with Needle Movement 2002-01-2663
Utilization of direct injection systems is one of the most promising technologies for fuel economy improvement for SI engine powered passenger cars. Engine performance is essentially influenced by the characteristics of the injection equipment. This paper will present CFD analyses of a swirl type GDI injector carried out with the Multiphase Module of AVL's FIRE/SWIFT CFD code. The simulations considered three phases (liquid fuel, fuel vapor, air) and mesh movement. Thus the transient behavior of the injector can be observed. The flow phenomena known from measurement and shown by previous simulation work [2, 7, 10, 11] were reproduced. In particular the simulations shown in this paper could explain the cause for the outstanding atomization characteristics of the swirl type injector, which are caused by cavitation in the nozzle hole.
Citation: Meister, G., Alajbegovic, A., Lai, M., and Yoo, J., "Transient Simulation of DGI Engine Injector with Needle Movement," SAE Technical Paper 2002-01-2663, 2002, https://doi.org/10.4271/2002-01-2663. Download Citation
Author(s):
Gerhard F. Meister, Ales Alajbegovic, Ming-Chia Lai, Joon-Ho Yoo
Affiliated:
AVL Powertrain Engineering, Inc., Wayne State University, Delphi Automotive Systems
Pages: 9
Event:
SAE Powertrain & Fluid Systems Conference & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Gasoline Direct Injection Engines 2002-SP-1719
Related Topics:
Spark ignition engines
Fuel economy
Computational fluid dynamics
Simulation and modeling
Fire
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