1. Simulation on the Efficiency of Labyrinthian Oil-air Separator in a GDI Engine.
- Author
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Wang Fuzhi and Zhu Tao
- Subjects
- *
OIL separators , *AUTOMOBILE engines , *COMBUSTION chambers , *SIMULATION methods & models , *EULER-Lagrange system - Abstract
In supercharged GDI engine, due to the low efficiency of oil-air separator, oil droplets enter combustion chamber and form local hot spots leading to 'super knock', and using CFD simulation in analyzing the efficiency of oil-air separator has the drawbacks of convergence difficulty and high demands on computing resources. In view of that, an alternative two-phase flow calculation scheme--Euler-Lagrangian algorithm is presented in this paper. The specific ideas of the algorithm is that firstly Euler algorithm is used to calculate the gaseous-phase flow field of oil-air separator, then based on the calculation results oil particles are introduced and using Lagrangian particle tracking algorithm to analyze liquid-phase flow field and find out the rule of particle movement in flow field and indirectly evaluate the separation efficiency of oil-air separator. Finally the best structure of oil-air separator is sorted out through schemes comparison. [ABSTRACT FROM AUTHOR]
- Published
- 2012