Advanced SearchSearch Tips
The Effect of Swirl Number on the Flow Characteristics of Flat Flame Burner
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
The Effect of Swirl Number on the Flow Characteristics of Flat Flame Burner
Jang, Yeong-Jun; Jeong, Yong-Gi; Jeon, Chung-Hwan;
  PDF(new window)
Burner of Flat Flame type expects the uniform flame distribution and NOx reduction. The characteristics of Flat Flame Burner become different according to swirl number in the burner throat. Experiments were focused on swirl effect by four types of swirler with different swirl numbers (0, 0.26, 0.6 and 1.24). It shows many different flow patterns according to swirl number using PIV(Particle Image Velocimetry) method. The flow of burner with swirler is recirculated by pressure difference between its center and outside. Recirculated air makes stable in flame, and reduced pollutant gas. In case of swirl number 0, main flow passes through axial direction. As swirl number increased, The backward flow develops in the center part of burner and Flow gas recirculates. This is caused by radial flow momentum becomes larger than axial flow by swirled air and the pressure at center drops against surrounding. As swirl number increases, the radial and axial velocity was confirmed to be larger than low swirl numbers. And turbulence intensity have similar pattern. The CTRZ(Central Toroidal Recirculation Zone) is shown evidently when y/D=1 and S=1.24. The boundary-layer between main flow and recirculated flow is shown that the width is seen to be decreased as swirl number increased.
Flat Flame Burner;PIV(Particle Image Velocity);Swirl Number;CTRZ;
 Cited by
연소로 내 2차공기의 주유동 수직방향 선회분사로 인한 선회류가 스월수에 따른 가스 체류시간과 혼합 특성에 미치는 영향,박상욱;전병일;류태우;황정호;

대한기계학회논문집B, 2006. vol.30. 1, pp.48-56 crossref(new window)
Hoffmann, S., Lenze, B. and Eickhoff, H., 1998, 'Results of Experiments and Models for Predicting Stability Limits of Turbulent Swirling Flames,' Journal of Engineering for Gas Turbines and Power. Transactions of the ASME, Vol. 120, No. 2, pp. 311-316

Yegian, D. T. and Cheng, R. K., 1998, 'Development of a Lean Premixed Low-Swirl Burnner for Low NOx Practical Applications,' Com. Sci. and Tech., Vol. 139, No 1, pp. 207-227 crossref(new window)

Hiett, G. F. and Powell, G. E., 1962, 'Three Dimensional Probe for Investigation to Flow Patterns,' The Engineer, pp. 165-170

Mathur, M. L. and Maccallum, N. R. L., 1976, 'Swirling Air Tests Issuing from Vane Swirlers,' J. of the Institute of Fuel, Vol. 41, pp. 238-240

Chaturvedi, M.C., 1963, 'Flow Characteristics of Axisymmetric Expansion,' Proceedings, J. of the Hydraulics Division, ASCE, Vol. 89, No. HY3, pp. 61-92

Sang-Nam Lee, Hyung-kee Yoon, Jeon-In RYU, 1996, 'Flow Field Characteristics of a High Load Combustor,' KSME 96S151, pp. 58-63

Aoki, K and Nakayama, 1987, 'The Flow Characteristics in Swirl type Combustor,' Laser Diagnostics and Modeling of Combustion, pp. 45-54

Stephan, E. Schmidt, Paul O. Hedman, 1995, 'CARS Temperature and LDA Velocity Measurement in a Turbulent, Swirling Premixed Propane/Air Fueled Model Gas Turbine Combustor,' ASME 95-GT-64

Adrian, R. J., 1991, 'Particle Imaging Techniques for Experimental Fluid Mechanics,' Annu. Fluid. Mech., Vol. 23, pp. 201-304 crossref(new window)

Sang-joon Lee, 1999, 'PIV-Velocity Field Measurement,'

Chang, T. P., 1985, 'Image Processing of Tracer Particle Motion as Applied to Mixing and Turbulent Flow,' Chemical Engineering Science, Vol. 40, No. 2

Armstrong, N. W. H. and Bray, K. N. C., 1992, 'Premixed Turbulent Combustion Flowfield Measurement Using PIV and LST and Their Application to Flamelet Modeling of Engine Combustion,' SAE No. 922322

Keane, R. D. and Adrian, R. J., 'Theory of Cross-Correlation Analysis of PIV Image, Flow Visualization and Image Analysis,' F. T. M. Nieuwstadt(ed.) Kluwer Academic Pub., pp. 1-25

Yang, W. J., 1989, Handbook of Flow Visualization, Hemisphere Pub. Co.