Application of Light Collecting Probe with High Spatial Resolution to Spark-Ignited Spherical Spray Flames

불꽃점화 구형분무화염에서 고공간 분해능을 가진 집광프로브의 응용

  • Yang Young-Joon (Department of Mechanical Engineering, Dong-A University)
  • 양영준 (동아대학교 기계공학과)
  • Published : 2004.09.01

Abstract

In order to obtain the flame Propagation speed in freely falling droplet suspension Produced by an ultrasonic atomizer, a light collecting probe named Multi-color Integrated Cassegrain Receiving Optics (MICRO) is applied to spark-ignited spherical spray flames. Two MICRO probes are used to monitor time-series signals of OH chemilumine-scence from two different locations in the flame. The flame propagation speed is calculated by detecting the arrival time difference of the propagating flame front. In addition, time-series images of OH chemiluminescence are simultaneously obtained by a high-speed digital CCD camera to ensure the validity of the MICRO system. Furthermore, relationship between the spray properties measured by phase Doppler anemometer (PDA) and the flame propagation speed are discussed with k different experimental conditions by changing the fuel injection rate. It was confirmed that the MICRO probe system was very useful and convenient to obtain the flame propagation speed and that the flame propagation speed was different depending on the spray properties.

Keywords

References

  1. G. Continillo, W. A Sirignano, 'Cmmterflow Spray Combustion Modelin', Combust. Flame, Vol. 81, pp. 325-340, 1990 https://doi.org/10.1016/0010-2180(90)90029-Q
  2. A Cessou, D. Stepowski, 'Planar Laser Induced Fluorescence Measurement of [OH] in the Stabilization Stage of a Spray Jet Flame', Combust. Sci. and Tech., Vol. 118, pp. 361-381, 1996 https://doi.org/10.1080/00102209608951986
  3. J. B. Greenberg, I. Silvennan, Y. Tambour, 'A New Heterogeneous Burning Velocity Fonnula for the Propagation of a Laminar Flame Front Through a Polydisperse Spray of Droplets', Combust. Flame, Vol. 104, pp. 358-368, 1996 https://doi.org/10.1016/0010-2180(95)00140-9
  4. S. C. Li, F. A. Williams, 'Experimental and Numerical Studies of Two stage Methanol Flames', Proc. of the Combustion Institute, Vol. 26, pp. 1017-1024, 1996 https://doi.org/10.1016/S0082-0784(96)80315-8
  5. H. H. Chiu, C. L. Lin, 'Anomalous Group Combustion of Premixed Clusters', Proc. of the Combustion nstitute, Vol. 26, pp. 1653-1661, 1996
  6. F. Akamatsu, K. Nakabe, M .Katsuki, Y. Mizutani,T. Tabata, 'Structure of Spark Ignited Spherical Flames Propagating in a Droplet Cloud', in Developments in Laser Techniques and Applications to Fluid Mechanics, Ed. R .J. Adrian, D. F. G. Durao, F. Durst, M V. Heitor, M .Maeda, J. H. Whitelaw, pp. 212-223, Springer Verlag, 1994
  7. F. Akamatsu, T. Wakabayashi, S. Tsushima, M. Katsuki, Y. Mizutani, Y. Ikeda, N. Kawahara, T. Nakajima, 'Development of Light Collecting Probe with High Spatial Resolution Applicable to Randomly Fluctuating Combustion Fields', Measurement Science and Technology, Vol.10, pp. 1240-1246, 1999 https://doi.org/10.1088/0957-0233/10/12/316