Back to Search
Start Over
Effect of a transition in a species fraction of fuel on the behaviour of a premixed flame
- Source :
- Nihon Kikai Gakkai ronbunshu, Vol 84, Iss 857, Pp 17-00168-17-00168 (2018)
- Publication Year :
- 2018
- Publisher :
- The Japan Society of Mechanical Engineers, 2018.
-
Abstract
- Flame height variations of a laminar stagnating premixed flame with gas component transition between fuel mixture A (methane:92%, ethane:6.7%, propane:1.3%) and B(methane:84%, ethane:13.3%, propane:2.7%), and between A and C (methane:76%, ethane:20.0%, propane:4.0%) are discussed. The estimation of the flame speed and the flame temperature of fuel mixtures A, B and C by the Chemkin-Pro show almost the same values for all fuel mixtures. In experiments, the transition between A and B and between A and C were performed. The transition time changes from 1 s to 10 s, keeping flow velocity and equivalence ratio constant at 0.8 m/s and 0.7 respectively. The flame position was measured by using images taken by a high speed camera with 125 fps. Two transition patterns are examined, keeping the total flow rate of premixed mixture constant. One is the constant flow rate transition, which changes the gas component, keeping the fuel mixture flow rate constant. The other is the constant equivalence ratio transition, keeping the equivalence ratio constant. In the case of the constant flow rate transition, the equivalence ratio changes which results in the variation in the flame speed, the flame temperature and the flame height. It means that the combustion state changes with the transition. On the other hand, in the case of the constant equivalence ratio transition, the flame speed, the flame temperature and the flame height keep almost the same state, which means that the gas component can be changed, keeping the combustion state the same.
Details
- Language :
- Japanese
- ISSN :
- 21879761
- Volume :
- 84
- Issue :
- 857
- Database :
- Directory of Open Access Journals
- Journal :
- Nihon Kikai Gakkai ronbunshu
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6d041fb9b54d84896c5a9ded6995e8
- Document Type :
- article
- Full Text :
- https://doi.org/10.1299/transjsme.17-00168