dc.creator Sulzmann, K. G. P. en_US dc.creator Penner, S. S. en_US dc.creator Heffington, W. M. en_US dc.creator Kline, J. M. en_US dc.date.accessioned 2006-06-15T14:33:27Z dc.date.available 2006-06-15T14:33:27Z dc.date.issued 1980 en_US dc.identifier 1980-RH-10 en_US dc.identifier.uri http://hdl.handle.net/1811/11316 dc.description 1. K.G.P. Sulzmann, J.M. Kline and S.S. Penner, JQRT 21, 475 (1979) 2. W.M. Heffington, G.E. Parks, K.G.P. Sulzmann and S.S. Penner, JQRT 16, 9 (1976). 3. K.G.P. Sulzmann, JQRT 22, 195 (1979). 4. S.S. Penner and D.B. Olfe, Radiation and Reentry, Ch. 1, Academic Press, New York (1968).- en_US dc.description Author Institution: en_US dc.description.abstract In situ shock-tube chemical kinetic studies of combustion systems require specific and quantitative spectroscopic methods for concentration-time history measurements of reacting species which do not suffer from interferences by other species. As typical examples for this purpose, we have determined multiple-line correlation-absorption $coefficients^{1}$ at $2259A(\Delta \lambda =39A)$ of low pressure ($\sim 5$ torr) emission lines by high-pressure ($0.5\sim$, atm$\sim 2.1$) and high-temperature $(905\sim T, ^{\circ} K\sim 2015)$ lines in the (0,0) band of the NO $\gamma$-band system and near line-center infrared absorption $coefficients^{2}$ at $3.329\mu$ of a He-Ne laser line by a high-pressure ($0.5\sim$p, atm$\sim 2.4$) and high-temperature $(965\sim T, ^{\circ} K\sim 2710$) line in the $\nu_{3}$-fundamental system of $CH_{4}$. The multiple-line absorption obeys an effective absorption coefficient for infinitely narrow emission lines and line-center absorption by isolated Voigt-lines with a common width. This model is applicable for a wide range of experimental conditions encountered in combustion $systems^{3}$ and results in a band f-number which differs by only $+6%$ from the preferred value when known line-width data are used. The laser-line absorption can be approximated by the line-center absorption of a Voigt-line for a symmetrical top and agrees at $300^{\circ} K$ (within $-4.5%$) with previous data when known line-width data are applied. The outlined methods are generally applicable and show that simple and analytical, quantitative $models^{4}$ for absorption data relevant to combustion studies are feasible. However, they require new experimental data for band-model and line-width parameters for many reactant, intermediate and product species. Examples are given of molecules and radicals of interest. en_US dc.format.extent 192954 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title MULTIPLE-LINE CORRELATION AND LASER ABSORPTION SPECTROSCOPY FOR IN SITU SHOCK-TUBE COMBUSTION STUDIES en_US dc.type article en_US
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