Effect of swirl on combustion characteristics in premixed flames
- Univ. of Maryland, College Park, MD (United States)
A double concentric premixed swirl burner is used to examine the structure of two different methane-air premixed flames. Direct flame photography together with local temperature data provides an opportunity to investigate the effects of swirl number distribution in each annulus on the global and local flame structure, flame stability and local distribution of thermal signatures. An R-type thermocouple compensated of high-frequency response is used to measure the local distribution of thermal signatures in two different flames, each of which represents a different combination of swirl n umber in the swirl burner. In order to improve the accuracy of the temperature data at high-frequency conditions, information on the thermocouple time constant are also obtained under prevailing conditions of local temperature and velocity by compensating the heat loss from the thermocouple sensor bead. These results assist in quantifying the degree of thermal nonuniformities in the flame signatures as affected by the distribution of swirl and to develop strategies for achieving uniform distribution of temperatures in flames.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 665372
- Report Number(s):
- CONF-970604--
- Journal Information:
- Journal of Engineering for Gas Turbines and Power, Journal Name: Journal of Engineering for Gas Turbines and Power Journal Issue: 3 Vol. 120; ISSN JETPEZ; ISSN 0742-4795
- Country of Publication:
- United States
- Language:
- English
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