Absorption of Microwaves in Low Intensity Eucalyptus Litter Fire
作者： Douglas Letsholathebe , Kgakgamatso Mphale
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摘要: A fuel bed was constructed where various vegetation species could be used as combustion fuel. The equipped with a thermocouple to measure fire temperature and two-port automatic network analyser microwave scattering parameters in flame medium. are then determine propagation characteristics fire. measurements have implications on radio wave communication during wildfire suppression remote sensing. attenuation data also provide an estimation of ionisation conductivity. Eucalyptus litter maximum 976 K set the X-band microwaves (7.00 - 9.50 GHz) were caused propagate through flame. Attenuation 0.35 0.90 dB measured for frequency range. For low intensity fire, conductivity range from 0.00021 0.00055 mho/m electron density 1.83 2.24 × 1015 m-3.
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Roland Herrmann, Paul T Gilbert, R Auerbach, C. Th. J Alkemade, Fundamentals of analytical flame spectroscopy ,(1979)
V.V. Varadan, K.A. Jose, V.K. Varadan, In situ microwave characterization of nonplanar dielectric objects IEEE Transactions on Microwave Theory and Techniques. ,vol. 48, pp. 388- 394 ,(2000) , 10.1109/22.826837
Joseph Santoru, Daniel J. Gregoire, Electromagnetic‐wave absorption in highly collisional plasmas Journal of Applied Physics. ,vol. 74, pp. 3736- 3743 ,(1993) , 10.1063/1.354520
K. M. Mphale, M. Heron, Nonintrusive measurement of ionisation in vegetation fire plasma European Physical Journal-applied Physics. ,vol. 41, pp. 157- 164 ,(2008) , 10.1051/EPJAP:2008013
Prasad K. Kadaba, Simultaneous Measurement of Complex Permittivity and Permeability in the Millimeter Region by a Frequency-Domain Technique IEEE Transactions on Instrumentation and Measurement. ,vol. 33, pp. 336- 340 ,(1984) , 10.1109/TIM.1984.4315236
M. Šícha, Measurement of the electron energy distribution function in flame plasma at atmospheric pressure Czechoslovak Journal of Physics. ,vol. 29, pp. 640- 645 ,(1979) , 10.1007/BF01600014
N. A. Nesterko, �. N. Taran, Ionization and radiation of alkali metals in acetylene ? Air flame plasma, with halogen additions Journal of Applied Spectroscopy. ,vol. 14, pp. 242- 244 ,(1971) , 10.1007/BF00613182
E. Koretzky, S. P. Kuo, Characterization of an atmospheric pressure plasma generated by a plasma torch array Physics of Plasmas. ,vol. 5, pp. 3774- 3780 ,(1998) , 10.1063/1.872741
Kgakgamatso Mphale, Mal Heron, Tej Verma, EFFECT OF WILDFIRE-INDUCED THERMAL BUBBLE ON RADIO COMMUNICATION Progress in Electromagnetics Research-pier. ,vol. 68, pp. 197- 228 ,(2007) , 10.2528/PIER06072202
Fred P. Adler, Measurement of the Conductivity of a Jet Flame Journal of Applied Physics. ,vol. 25, pp. 903- 906 ,(1954) , 10.1063/1.1721767