Accession Number : AD0480477

Title :   INFRARED SPECTROSCOPIC STUDY OF HYDROGEN-FLUORINE FLAMES. II: ANALYTICAL PROCEDURES,

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Simmons, F. S.

Report Date : MAR 1966

Pagination or Media Count : 33

Abstract : Analytical methods are developed for relating strengths and true widths of Lorentz lines to the total radiances and equivalent widths observed along nonisothermal paths. Approximate relations, based on weak-line and strong-line assumptions, are derived. Approximations for the case of intermediate optical depths are proposed; these are based on assumptions of nearly weak or nearly strong lines. The various expressions are applied in developing relations for calculating net spectral radiances and absorptances at the boundary of a nonisothermal gas with a known temperature distribution, as observed with an instrument of moderate resolving power. The inverse problem of deducing internal temperature gradients and line strengths from such spectroscopic measurements is discussed. The ranges of validity for the various approximations are estimated for hydrogen fluoride. (Author)

Descriptors :   (*EXHAUST GASES, INFRARED SPECTROSCOPY), (*EXHAUST FLAMES, INFRARED SPECTROSCOPY), FLAMES, ABSORPTION SPECTRA, INFRARED SPECTRA, BANDWIDTH, LINE SPECTRA, INFRARED RADIATION, TEMPERATURE, MATHEMATICAL ANALYSIS, HYDROGEN COMPOUNDS, FLUORIDES, INORGANIC ACIDS, FLUORINE, HYDROGEN, THERMAL PROPERTIES, THERMAL RADIATION.

Subject Categories : Optics
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE