Accession Number : AD0467863


Title :   EMISSION OF OPTICAL RADIATION FROM HIGH PRESSURE GASES


Descriptive Note : Interim rept.


Corporate Author : POLYTECHNIC INST OF BROOKLYN NY DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS


Personal Author(s) : Zirkind, Ralph


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/467863.pdf


Report Date : Dec 1964


Pagination or Media Count : 14


Abstract : The observed spectral emittance of high temperature and density nitrogen was examine where the gas was ompressed isentropically to a temperature and pressure of 7200 K and 4500 kg/sq cm respectively. The analysis indicated that the radiation was composed of a near blackbody continuum and of nitrogen band emissions where the predominant bands were N2+(1-), N2(1+) and N2(2+). Examination of the ratio of the latter two bands then made possible the reconstruction of the temperature history of the gas in the vicinity of peak compression. It was determined also that in comparison to the temperature, the relatively high density ratio of 250 played a minor role in the emitted radiant intensity.


Descriptors :   *EMISSION SPECTRA , *GASES , DENSITY , INTENSITY , HIGH PRESSURE , NITROGEN , BLACKBODY RADIATION , ARGON , THERMAL RADIATION , EMISSIVITY , ULTRAVIOLET SPECTRA , LINE SPECTRA


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


Distribution Statement : APPROVED FOR PUBLIC RELEASE