Numerical Simulation on Spray Atomization and Fuel-Air Mixing Process in a Gasoline Direct Injection Engine 2012-01-0395
Numerical simulation has been widely used in the engine development process to improve the development quality, especially in the area of in-cylinder flow and fuel evaporation. In this paper, a fuel spray model for a gasoline direct injection (GDI) engine, calibrated against spray visualization in a spray bomb, is developed to characterize the fuel spray atomization, vaporization, and interaction with in-cylinder air flow. With this model, fuel atomization and fuel-air mixing process are thoroughly analyzed at full load operating conditions at both low and high speeds. It is shown that fuel spray at high speed is deflected towards intake side, leading to limited wall wetting, piston wetting, and good vaporization, due to intensive tumble flow and high temperature. The results from the numerical simulation provide important guideline for the development of a GDI engine.
Citation: Liu, Y., Shen, Y., You, Y., and Zhao, F., "Numerical Simulation on Spray Atomization and Fuel-Air Mixing Process in a Gasoline Direct Injection Engine," SAE Technical Paper 2012-01-0395, 2012, https://doi.org/10.4271/2012-01-0395. Download Citation
Author(s):
Yunqing Liu, Yuan Shen, Yi You, Fuquan Zhao
Affiliated:
Geely Automotive Institute, Geely Automobile Institute, Zhejiang Geely Holding Group
Pages: 18
Event:
SAE 2012 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Fuel injection
Simulation and modeling
Pistons
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »