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자료유형
학술저널
저자정보
저널정보
한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제4권 제2호
발행연도
1996.3
수록면
11 - 22 (12page)

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It has been generally accepted that NOx formation increases as the maximum temperature or correspondingly the maximum pressure of a combustion system increases. Recently some exceptional experimental results have been reported that under certain circumstance NOx formation could be reduced while the maximum pressure was increasing by varying the methods of combustion for the same ind of premixed gases. Until now that kind of results have been acquired only for the case of a dual opposed prechamber. But the mechanism ahs not been clearly understood yet.
3D computer simulation has been tried to clarity the mechanism. For this purpose KIVA-Ⅱ has been modified and applied to the model combustion chamber with which the same kind of experimental works have been done by the authors. A good agreement with the experimental results was achieved with the spatial and temporal resolution which is hard to be obtained by the experimental methods. And it was observed that for the dual opposed prechamber case the time for the NOx formation. which is non-equilibrium reaction, is shorter than any other case by an appropriate mixing process in the main combustion chamber. The shorter time reduceed heat loss through the combustion chamber walls and thereby obtained the higher maximum pressure.

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3. 계산결과 및 검토

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