Effect of Swirl on Combustion Characteristics in Premixed Flames
Author:
Gupta A. K.1, Lewis M. J.1, Qi S.1
Affiliation:
1. The Combustion Laboratory, University of Maryland, Department of Mechanical Engineering, College Park, MD 20742
Abstract
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 for high-frequency response is used to measure the local distribution of thermal signatures in two different flames, each of which represents a different of thermal signatures in two different flames, each of which represents a different of thermal signatures in two combination of swirl number 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 achievinguniform distribution of temperatures in flames.
Publisher
ASME International
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference8 articles.
1. Gupta, A. K., Lilley, D. G., and Syred, N., 1984, Swirl Flows, Abacus Press, Tunbridge Wells, England. 2. Leuckel
I. W.
, and FrickerN., 1976, “The Characteristics of Swirl-Stabilized Natural Gas Flames,” J. Inst. Fuel, Vol. 49, June 1976, pp. 103103. 3. Chen, R. H., and Driscoll, J. F., 1988, “The Role of Recirculation Vortex in Improving Fuel-Air Mixing Within Swirling Flames,” 22nd Symposium (International) On Combustion, The Combustion Institute, Pittsburgh, PA, pp. 531–540. 4. Gupta, A. K., Syred, N., and Beer, J. M., 1975, “Fluctuating Temperature and Pressure Effects on the Noise Output of Swirl Burners,” Proc, 15th Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, PA, pp. 1367–1377. 5. Gupta, A. K., Beer, J. M., and Swithenbank, J., 1976, “Concentric Multi-Annular Swirl Burners: Stability Limits and Emission Characteristics,” Sixteenth Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, PA, pp. 79–91.
Cited by
29 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|