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Show (5) Results showed that other than H20 and CO: commonly seen in hydrogen carbon fuel, the radiation property of CH" also played an important role. But the spectrum of their emission and absorption mostly concentrated in the infrared( 0.7- 10 J..LI71 ). • (6) The refractive indices derived by the Drude-Lorentz model generally matches the expenmental value quite accurately. As for the prediction of absorption coefficient equation, th~ model is ~nly effective in the case of extremely small spherical soot. Overall, the absorption coeffictent distribution predicted tends to decrease steeply all the way in the visible and Infrared. Greater differences only occur in short wavelength region. REFERENCE [1] K. Y. Lee, Z. Y. Zhong and C. L. Tien, "Blockage of Thermal Radiation Due to Soot Layer in Combustion of Condensed Fuels", 20th Symposium on Combustion. The Combustion Institute, 1'1'.1692-1636, 1984 [2] S. L. Che~ H. K. Ma and D. Y. Ch~ " Radiation Blockage by the Interaction of Thermal Radiation with Conduction and Convection in the Combustion of Condensed Fuels It , Int. Comm. Heat Mass Transfer Vol. 20, 1'1'. 145-157, 1993 [3] S. W. Baek and C. Lee, " He3t Transfer in a R3diating Medium between Flame and Fuel Surface ", Combustion and Flame. 75 : 153-163, 1989 [41 W. H. Dalzell and A F. Sarofi~ "Optical Constants of Soot and Their Application to He3t-Flu.~ C31cul3tions", Journal of Heat Transfer, February. pp.l00-104, 1969 [51 T. T. Charalarnpopoulos and H. Chang, "In Situ Optical Properties of Soot P:uticles in the Wavelength lUng from 340nm to 6OOnm", Combust. Sci. and Tech .. Vol. 59. pp.401-421, 1988 [6] Z. G. Habib and P. Ven1sc~ "On the Refractive Index of Soot at Flame Temperature It, Combust. Sci. and T~ch .. Vol. 59, pp.261-274, 1988 [7] B. J. Stagg and T. T. Charalampopoulos. " Refractive Indices of Pyrolytic Graphite, Amorphous Catbon and Fbme Soot in the Temperature Range 2S·C to 6OO·C It, Combustion and Flame. 94 : 381-396, 1993 [81 M Epstei~ F. B. Cheung, T. C. Chawla and G. M Hauser, " Effective Thermal Conducti\1ty for Combined Radiation and Free Convection in an Optically Thick Heated Fluid Layer", Transactions of the ASAfE. Vol.103, February pp.114-120, 1981 [9] A C. Ratzel and 1. R Howell, " Heat Transfer by Conduction and Radiation in One-Dimensional Planar Medium Using the Di1ferential Approximation", ASME. 1982 [10] T. F. Smi~ K. H. Byun and L. -D. Che~ " Effects of Radiative and Conductive Transfer an Thennal Ignition It , Combustion and Flame 73 : 67-74 1988 [111 M. F. Modest, " Radiative He3t Transfer ", Mc Graw-Hill. pp.295-322, 450-501, 1992 [121 A Tuntomo, S. H. Park and C.L. Ti~ "Infrared Radiation Properties of Ethylene", Experimental Heat Transfer. Vol. 2, pp.91-103, 1989 [131 M F. Modest, "Radiative Heat Transfer It , Alc Graw-Hill. pp.323-382. 1992 [14] S. C. Lee and, C. L. Tie~ "Optical Constants of Soot in Hydrocarbon Flames", Eighte~n Symposium on Combustion. The Combustion Institute. 1'1'.1159-1166, 1981 [15] M. B. HamadL P. Vewisch and A Coppalle, " Radiation Properties of Soot from Premixed Flat Flame It , Combustion and Flame, 68: 57-67, 1987 (16) K. Saito, A S. Gordo~ F. A Williams and W. F. Stickle, " A Study of the Early History of Soot Fonnation in Various Hydrocarbon Diffusion Flames ", Combust. Sci. and Tech.. Vol. 80, 1'1'.103 -119, 1991 [17] U. O. Koylu and G. M F~ "Radiative Properties of Flame-Generated Soot ", Joumal of Heat Transfer. Vol : 115, pp.409-417, 1993 [18] P. Markatou, H. Wang and M Frenldach, " A Computational Study of Sooting Limits in Laminar Premixed Flames of Ethane.Ethylene and Acetylene ", Combustion and Flame. 93 : 467-482, 1993 [19] M F. M~ "Radiative Heat Transfer ".Mc Graw-Hill. pp.383-437, 1992 [20] W. W. Yue:n and A ~ " Evaluation of Total Emittance of an Isothermal Nongray Absorbin~ Scattering Gas-Particle Mixture Based on the Concept of Absorption Mean Beam Length ", Journal of H~at Transfer. Vol. 114, pp.653-6S8, 1992 [211 E. Meeks et 31 .. "Ignition of Blended-Fuel Drops". Combustion and Flame. Vol. 96 , No. 1-4. 1994 11 |