Tangential combustor using propane-air mixtures was utilized to investigate the formation of thermal NO
x and the effect of water - spray on NO
x reduction. Measurements of temperature and NOx concentration in combustor were made in detail along both axial and radial directions, so as to comprehend the correspondence of NO
x formation with gas temperature and the effect of water spray on the temperature distribution in the combustor, which strongly affects NO
x formation.
Combustor for this work was made to prevent back-mixed flow as far as possible, so that NO
x formation in post-flame gas could be distinguished from that in primary reaction zone. As a result, for the former, formation of NO
x could be expected to follow the Zeldovich mechanism and, for the latter, NO
x formation was independent of gas temperature and consequently no effect of water spray on NO
x reduction was observed.
抄録全体を表示