| PHENOMENOLOGICAL TWO-PHASE MULTI-ZONE COMBUSTION MODEL FOR DIRECT-INJECTION DIESEL ENGINES |
| K. ZHANG1, M. XU2, J. WEI1, Y. CUI1, K. DENG1 |
1Shanghai Jiao Tong University
2Technique Center of Dongfeng Commercial Vehicle |
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| ABSTRACT |
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This paper proposed a quasi-dimensional combustion model from a new observed two-phase penetration and combustion phenomenon in diesel spray. In the model, fuel spray was divided into two of liquid and gas phase areas. Considering the phenomenon that separation of gas and liquid phase in diesel spray occurs during spray penetration, gas and liquid area of spray are discretized respectively. Liquid phase areas play important role in fuel mass transport, however gas phase areas are the main region for fuel combustion in the model. Fuel and air mixing rate of gas phase zone is the key for the calculation of combustion rate. Validation experiments are designed by using optimal Latin hypercube design method. Comparison of calculations and experiments show that the model is able to predict diesel engine performance at different engine speeds, loads, and injection pressure and timing, and provides guidance for the design of engines. |
| Key Words:
Phenomenological model, Two phase, Multi-zone, Diesel combustion |
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