Abstract
Effect of CO_2 addition on combustion and emission characteristics of diesel spray in a high temperature and high pressure vessel was experimentally examined under low O_2 concentration ambient. The rate of O_2 concentration was changed from 8 to 21% and the rate of CO_2 concentration was changed from 0 to 15%. It is confirmed that O_2 concentration is a dominant parameter for the combustion characteristics. The flame temperature decreases with the decrease of O2 concentration and with the increase of CO_2 addition. Furthermore the soot production was suppressed under the very low O_2 concentration condition.
