This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Study of the Effects of Chamber Geometries on Flame Behavior in a DI Diesel Engine
Annotation ability available
Sector:
Language:
English
Abstract
An experimental study aiming to investigate the effects of combustion chamber geometry on combustion process has been carried out in an optically accessible DI diesel engine. The combustion processes of three different chamber geometries, included the production type, were revealed and the flame movement behaviors such as the distribution of flame velocity vectors and the averaged flame velocity inside and outside the combustion chamber were measured by means of a cross-correlation method. Meanwhile, an endoscope system was used to acquire information about the distribution of flames inside and outside the chamber. BY comparing the flame movement and distribution between different chambers and nozzle protrusions, the results showed that; The chamber geometry has significant effect on the flame velocity, the flame velocities of the reentrant chamber were larger than that of the dish chamber during expansion period. The flame distribution inside and outside the chamber is considerably affected by the chamber wall geometry, and the reentrant chamber prevents the flame from spreading over the squish region.
The relationship between these changes of the flame behaviors and its smoke emissions measured in the same engine under the same experimental conditions are also discussed. This relationship has indicated that for further smoke reduction, it is important to achieve large flame motion during diffusion combustion and desirable fuel/flame distribution inside and outside the chamber simultaneously.
Authors
Topic
Citation
Zhang, L., Ueda, T., Takatsuki, T., and Yokota, K., "A Study of the Effects of Chamber Geometries on Flame Behavior in a DI Diesel Engine," SAE Technical Paper 952515, 1995, https://doi.org/10.4271/952515.Also In
References
- Zhang L. et al. “Basic Study of White Smoke on DI Diesel Engine (Relationship between Flame Characteristics and Both White Smoke and HC)” Trans.of JSME(B) 59 559 March 1993
- Zhang L. et al. “An Analysis of the Combustion of a DI Diesel Engine by Photograph Processing” SAE Trans. Paper, No. 930594 1993
- Zhang L. et al. “An Observation and Analysis of the Combustion Under supercharging on a DI Diesel Engine” SAE Paper No. 940844 1994
- Takatsuki T. et al. “Development of a New Low-pollution and High-output Combustion Chamber” Journal of JSAE. 48 10 36 1994
- Zhang L. et al. “In-Cylinder Flow Measurement by Cross-Correlation Method” Trans. of JSAE 25 4 10 1994
- Tabata T. et al. “Numerical Calculation of Spray Mixing Process in a D.I.Diesel Engine and Comparison with Experiments” SAE Paper 950853 1995
- ShioJi M. et al. “An Analysis of Diesel Engine Flame by Picture Processing” JSME Int.Journal, Series 2 32 3 1989
- Yamaguchi I. et al. “An Analysis of High Speed Combustion Photographs for D.I. Diesel Engine with High Pressure Fuel Injection” SAE Paper 901577 1990
- Bjorkquist D.C. et al. “Particle Image Velocimetry,” ATLAS OF VISUALIZATION, Progress in Visualization 1 1992 313 PERGAMON PRESS 1993 TOKYO
- Aoyagi Y. et al. “A Gas sampling Study on the Formation Processes of Soot and NO in a DI diesel engine” SAE Paper 800254 1980