Accession Number : AD0645113

Title :   ROTATIONAL TEMPERATURE MEASUREMENTS IN NITROGEN USING AN ELECTRON BEAM,

Corporate Author : PENNSYLVANIA HOSPITAL PHILADELPHIA UNIT FOR EXPERIMENTAL PSYCHIATRY

Personal Author(s) : Hickman,Roy Scott

Report Date : SEP 1966

Pagination or Media Count : 31

Abstract : The models used for determination of the rotational temperature from the spectra of fluorescence of nitrogen induced by collisions with electrons are reviewed and discussed. It was found necessary to introduce a new model which is a composite of two processes and allows rotational changes of delta K of plus or minus 1 and plus or minus 3 to obtain agreement with temperatures obtained in rarefied flows of nitrogen. Data is presented for a flow of nitrogen in a nozzle and an overexpanded sonic orifice flow. It is shown that the data reduced with the new model agrees with the predicted translational temperature to within the characteristic rotational temperature and can be used to measure the rotational temperature at low temperatures. (Author)

Descriptors :   (*NITROGEN, MOLECULAR SPECTROSCOPY), FLUORESCENCE, ROTATION, ELECTRON TUBES, MEASUREMENT, NOZZLE GAS FLOW, ORIFICES, RAREFIED GAS DYNAMICS, VORTICES, TEMPERATURE

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE