Experimental Study on Flow Structure of a Swirling Non-Premixed Syngas Flame

doi:10.1007/s12204-012-1294-9

Abstract

Abstract: Abstract: The development of integrated gasification combined cycle (IGCC) systems provides cost-effective and environmentally sound options for meeting the future coal-utilizing power generation needs in the world. The combustion of gasified coal fuel significantly influences overall performance of IGCC power generation. Experiments are performed to investigate the characteristics of syngas swirling flame using the particle image velocimetry (PIV) in this paper. With the increase of CO/H2 molar ratio, the distance between the nozzle and the fuel vortex in flame increases at first, and then reduces slowly; maximum of the axial mean velocity increases continuously, but the axial mean velocity peaks on the side of centerline change little. The experiment indicates that with the increase of fuel to air velocity ratio, the fuel vortex grows up at first, and then becomes thinner; the distance from the fuel vortex to the nozzle reduces at first, and then increases; inner boundary of the recirculating zone increases. Furthermore, difference between the methane swirling flow field and the syngas swirling one is analyzed in this paper. It can establish the benchmarks for the development and validation of combustion numerical simulation by the data from this experiment.

Key words: swirling combustion| syngas combustion| particle image velocimetry (PIV)| flow structure

摘要： Abstract: The development of integrated gasification combined cycle (IGCC) systems provides cost-effective and environmentally sound options for meeting the future coal-utilizing power generation needs in the world. The combustion of gasified coal fuel significantly influences overall performance of IGCC power generation. Experiments are performed to investigate the characteristics of syngas swirling flame using the particle image velocimetry (PIV) in this paper. With the increase of CO/H2 molar ratio, the distance between the nozzle and the fuel vortex in flame increases at first, and then reduces slowly; maximum of the axial mean velocity increases continuously, but the axial mean velocity peaks on the side of centerline change little. The experiment indicates that with the increase of fuel to air velocity ratio, the fuel vortex grows up at first, and then becomes thinner; the distance from the fuel vortex to the nozzle reduces at first, and then increases; inner boundary of the recirculating zone increases. Furthermore, difference between the methane swirling flow field and the syngas swirling one is analyzed in this paper. It can establish the benchmarks for the development and validation of combustion numerical simulation by the data from this experiment.

关键词: swirling combustion| syngas combustion| particle image velocimetry (PIV)| flow structure

CLC Number:

TK 16
O 357

GE Bing* (葛冰), ZANG Shu-sheng (臧述升), GUO Pei-qing (郭培卿). Experimental Study on Flow Structure of a Swirling Non-Premixed Syngas Flame[J]. Journal of shanghai Jiaotong University (Science), 2013, 18(1): 92-100.

References

[1] Pronske K, Trowsdale L, Macadam S, et al. An overview of turbine and combustor development for coal-based oxy-syngas systems [C]//Proceedings of ASME Turbo Expo 2006. Barcelona: ASME, 2006: 817-828.
[2] Walton S M, He X, Zigler B T, et al. An experimental investigation of the ignition properties of hydrogen and carbon monoxide mixtures for syngas turbine applications [C]//Proceedings of the Combustion Institute, Thirty-First International Symposium on Combustion. Heidelberg: Elsevier, 2007: 3147-3154.
[3] Hasegawa T, Hisamatsu T, Katsuki Y. et al. Development of low NOx combustion technology in medium-Btu fueled 1300℃-class gas turbine combustor in an integrated coal gasification combined cycle [J]. Journal of Engineering for Gas Turbines and Power, 2003, 125(1): 1-10.
[4] Tsurikov M, Meier W, Geigle K P. Investigations of a syngas-fired gas turbine model combustor by planar laser techniques [C] // Proceedings of ASME Turbo Expo 2006. Barcelona: ASME, 2006: 303-309.
[5] Domenico M D, Kutne P, Naumann C, et al. Numerical and experimental investigation of syngas combustion in a semi-technical scale burner [C]// 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Orlando: AIAA, 2010: 1147-1162.
[6] Iyer V, Haynes J, May P, et al. Evaluation of emissions performance of existing combustion technologies for syngas combustion [C]//Proceedings of ASME Turbo Expo 2005. Reno-Tahoe: ASME, 2005: 353-365.
[7] Liu Ying-zheng, Chen Han-ping. Experimental investigation into swirling recirculating flow using PIV [J]. Journal of Hydrodynmic, 2003, 18(5): 601-606 (in Chinese).
[8] Gupta A K, Lilley D G, Syred N. Swirl flows [M]. Tunbridge Wells: Abacus Press, 1984.
[9] Stanislas M, Monnier J C. Practical aspects of image recording in particle image velocimetry [J]. Measurement Science and Technology, 1997, 8: 1417-1426.
[10] Keane R D, Adrian R J. Optimization of particle image velocimeters. Part 1. Double pulsed systems [J]. Measurement Science and Technology, 1990, 1: 1202-1215.
[11] Midgley K, Spencer A, Mcguirk J J. Unsteady flow structures in radial swirler fed fuel injectors [J]. Journal of Engineering for Gas Turbines and Power, 2005, 127: 755-764.