STAGNATION LAMINAR PREMIXED CH4/AIR FLAME SUBJECTED TO THE EQUIVALENCE RATIO OSCILLATIONS

Authors

  • Mohd Rosdzimin Abdul Rahman Department of Mechanical, Faculty of Engineering, Universiti Pertahanan Nasional Malaysia, Kem Sg. Besi, Kuala Lumpur, Malaysia
  • Hishashi Tomita Department of Mechanical Engineering, Keio University, Hiyoshi, Yokohama, Japan
  • Takeshi Yokomori Department of Mechanical Engineering, Keio University, Hiyoshi, Yokohama, Japan
  • Toshihisa Ueda Department of Mechanical Engineering, Keio University, Hiyoshi, Yokohama, Japan

DOI:

https://doi.org/10.11113/jt.v76.3690

Keywords:

Laminar premixed flame, equivalence ratio oscillation, turbulence reduction method

Abstract

The effect of the equivalence ratio oscillation on a premixed laminar CH4/air flame motion was studied experimentally with equivalence ratio oscillation frequencies of 2 to 15 Hz at lean equivalence ratio using stagnation flow field burner. Novel oscillator does the oscillation conditions and turbulence reduction method is used to suppress the velocity perturbation. The flame position variations at 2, 5, 10 and 15 Hz oscillation frequencies were significantly small when the amplitude of the equivalence ratio oscillation was zero. On the other hand, increase in amplitudes of the equivalence ratio oscillation increased the flame position variation significantly. The flame moved in sinusoidal shape and it can be clearly seen that the flame movement’s amplitude was proportional to the amplitudes of the equivalence ratio variations. This result showed that the velocity perturbation is significantly suppressed by turbulence reduction method in the examination range.

References

Ishida, K. 2003. Small and Medium Size Gas Turbines, Buletin of GTSJ.

Matsuyama, R., Kobayashi, M., Ogata, H., Horikawa, A., and Kinoshita, Y. 2012. Development of a Lean Staged Combustor for Small Aero-Engines, ASME Turbo Expo: Turbine Technical Conference and Exposition, Volume 2: Combustion, Fuels and Emissions, Parts A and B, (No. GT2012-68272). 211-218.

Epstein, A. H. 2012. Aircraft Engines’ Needs from Combustion Science and Engineering. Combustion and Flame. 159: 1791-1792.

Lieuwen, T., Neumeier, Y., and Zinn, B. T. 1998. The Role of unmixedness and Chemical Kinetics in Driving combustion Instabilities in Lean Premixed Combustors. Combustion Science and Technology. 135: 193-211.

Richards, G. A., Janus, M. and Robey, E. H. 1999. Control of Flame Oscillations with Equivalence Ratio Modulation. Journal of Propulsion and Power. 15(2): 232-240.

Yu, K. H. and Wilson, K. J. 2002. Scale-Up Experiments on Liquid-Fueled Active Combustion Control. Journal of Propulsion and Power. 18(1): 53-60.

Law, C. K. 1998. Dynamics of Stretch Flames. Symposium (International) on Combustion. 22(1): 1381-1402.

Ax, H. K., P. Meier, W., König, K., Maas, U., Class, A. and Aigner, M. 2009. Low Pressure Premixed CH4/Air Flames with Forced Periodic Mixture Fraction Oscillations: Experimental Approach. Applied Physics B: Lasers and Optics. 94(4): 705-714.

Takahashi Y., Suenaga Y., Kitano M., and Kudo M. 2006. Response of a Cylindrical Premixed Flame to Periodic Concentration Fluctuation. JSME International Journal Series B. 49(4): 1307-1315.

Suenaga, Y., Kitano, M. and Takahashi, Y. 2010. Propagation and Extinction of a Cylindrical Premixed Flame Undergoing Equivalence Ratio Fluctuation Near the Lean Limit. Journal of Thermal Science and Technology. 5(1): 124-134.

Schwarz, H., Zimmer L., Durox, D. and Candel, S. 2010. Detailed Measurements of the Equivalence Ratio Modulation in Premixed Flames using Laser Rayleigh Scattering and Absorption Spectroscopy. Exp. Fluids. 49: 809-821.

Loehrke, R. I and Nagib, H. M. 1972. Experiments on Management of Free-stream Turbulence, AGARD Report No. 598.

Derbunovich, G. I., Zemskaya, A. S., Repik, E. U., Sosedko, Y. P. 1993. Optimal Conditions of Turbulence Reduction with Screen. Fluid Dynamics. 28(1): 138-144.

Mikhailova, N. P., Repik, E. U., Sosedko, Y. P. 1994. Optimal Control of Free-stream Turbulence Intensity by Means of Honeycomb. Fluid Dynamics. 29(3): 163-174.

Kulkarni, V., Sahoo, N., and Chavan, S. D. 2011. Simulation of Honeycomb-screen Combinations for Turbulence Management in a Subsonic Wind Tunnel. Journal of Wind Engineering and Industrial Aerodynamics. 99: 37-45.

Tomita H., Rahman M. R. A., Miyamae S., Yokomori T. and Ueda T. 2015. Flame Dynamics of Equivalence Ratio Oscillations in a Laminar Stagnating Lean Methane/Air Premixed Flame. Proceeding of the Combustion Institute. 35(1): 989-997.

Downloads

Published

2015-08-26

Issue

Vol. 76 No. 1: September 2015

Section

Science and Engineering

License

Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.

How to Cite

STAGNATION LAMINAR PREMIXED CH4/AIR FLAME SUBJECTED TO THE EQUIVALENCE RATIO OSCILLATIONS. (2015). Jurnal Teknologi, 76(1). https://doi.org/10.11113/jt.v76.3690