Steady flow test and numerical simulation of a GDI engine

DOI

10.2991/emeit.2012.410How to use a DOI?

Keywords

steady flow test, numerical simulation, flow coefficient, GDI engine.

Abstract

In this paper, steady flow tests for air movement characteristics in cylinder and intake port flow coefficient of a GDI engine were carried out by means of steady flow test bench. Three-dimension numerical simulation model was established with consistent boundary conditions of steady flow tests. Experiment results indicated that tumble was the main air flow of this GDI engine. Intake port flow coefficient measured during tumble tests were lower than that of swirl tests, and as intake valves raised the difference between those two tests was more and more obvious. Simulation results were almost identical with experiment date. The in-cylinder velocity field and pressure field demonstrated that the structure of dummy cylinder in steady flow tests had a great influence on in-cylinder air flow. In tumble tests, air flow in dummy cylinder were turned back to intake valves and a part of intake air were pushed by the turned back flow. A sector of low speed and high back pressure area could be found near by intake valves. Such air flow impact was believed as the reason of such difference on intake port flow coefficient.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Man-qun LIN
AU  - Wei PENG
PY  - 2012/09
DA  - 2012/09
TI  - Steady flow test and numerical simulation of a GDI engine
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 1851
EP  - 1854
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.410
DO  - 10.2991/emeit.2012.410
ID  - LIN2012/09
ER  -