| FLAME PROPAGATION MODEL FOR A ROTARY ATKINSON CYCLE SI ENGINE |
| Mohammad Hassan Shojaeefard, Mojtaba Keshavarz |
| Iran University of Science and Technology |
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| ABSTRACT |
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The rotary Atkinson cycle engine includes two modes of combustion: combustion initiation and propagation in ignition chamber and then flame jet entrainment and propagation in expansion chamber. The turbulent flame propagation model is a predictive model for SI engines which could be developed for this type of combustion for the rotary Atkinson engine similar to the congenital engine with pre-chamber; in split combustion chamber SI engines, small amount of fuel is burned in pre-chamber while the fuel burned in ignition chamber of rotary Atkinson cycle is considerable. In this study a mathematical modeling of spherical flame propagation inside ignition chamber and new combined conical flame and spherical flame propagation model of a new two-stroke Atkinson cycle SI engine will be presented. The mathematical modeling is carried out using two-zone combustion analysis and the model also is validated against experimental tests and compared with previous study using non-predictive Weibe function model. |
| Key Words:
Turbulent flame, Jet entrainment, Internal combustion engine, Rotary engine |
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