Accession Number : AD0786021

Title :   Numerical Calculations of UV Emission and Absorption Spectra of OH.

Descriptive Note : Final rept. 1 Mar 72-1 Mar 73,


Personal Author(s) : Neer,Michael E.

Report Date : AUG 1974

Pagination or Media Count : 147

Abstract : The report presents the details and uses of a computer program designed to predict the ultraviolet emission and absorption spectra of OH associated with combustor flowfields. The intended purpose of the computer program is to facilitate the development of spectroscopic diagnostic techniques for specific application to supersonic mixing and combustion. The mathematical models used to represent the emitting and absorbing gas are given. Geometry and apparatus considerations are discussed, as well as calibration procedures. The computation scheme is outlined including the basic modes of operation, and the manner in which input data are submitted is explained. The various uses of the computer program are demonstrated and comparisons are made with experimental spectra. Two graphical inversion techniques are also presented, one of which can be used to obtain radial profiles of temperature and OH number density from an axisymmetric combustor flowfield. A listing of the computer program and a partial printout are included.

Descriptors :   *Hydroxyl radicals, *Ultraviolet spectra, Computer programs, Emission spectra, Electron transitions, Absorption spectra, Molecular energy levels, Molecular vibration, Molecular rotation, Combustion, Mixing, Molecular spectroscopy, Mathematical models, Temperature

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE