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This research is to estimate the possibility of using RM50 without any modification of engine. Comparing the pressure and exhaust emission noise which are the result of the experiment with the result of the numerical analysis, it tended to be similar, and the analysis of combustion and noise characteristics of RM50 are as follows. Maximum heat release rate is proportional to combustion speed and as the combustion speed gets higher, the timing bring the maximum gets faster. As engine speed increases, the difference in turbulent burning speed for each fuel increases in low-load condition, On the contrary, in the high-load condition of 9.2㎏f-m, the fuel characteristics appear scarcely compared to low-load condition. Moreover, in the low speed, high-load condition of 1500rpm, 9.2㎏f-m which is unstable operation condition, the turbulent burning speed has lowest value, especially, that of gasoline reduced more than RM50. Turbulent intensity tends to increase as engine speed and load increase, and the fuel characteristics appears well in low-load condition. Therefore, it results in the increment of NO emission, but because of the influence of chemical reaction dynamics and lower flame temperature respectively, it produces less NO. Consequently, it is taken to consider combustion characteristics which include the combustion speed as well as the temperature in cylinder by low heating value to estimate NO emission by RM50. RM50 has higher CPL than gasoline. This is related to the combustion speed and as the speed gets faster, pressure increase rate increases and rapid combustion sound is brought out.

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Abstract

1. 서 론

2. 실험장치

3. 수치모델

4. 결론 및 고찰

5. 결론

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UCI(KEPA) : I410-ECN-0101-2009-556-017792847