Accession Number : ADA263612


Title :   Kinetics and Energy Transfer in Nonequilibrium Fluid Flows


Descriptive Note : Final rept. 17 Jun 90-16 Sep 92,


Corporate Author : SRI INTERNATIONAL MENLO PARK CA MOLECULAR PHYSICS CENTER


Personal Author(s) : Crosley, David R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a263612.pdf


Report Date : 03 Feb 1993


Pagination or Media Count : 69


Abstract : Chemical kinetics and energy transfer have been investigated for nonequilibrium fluid flow. The particular process of interest is ultraviolet emission from the A2 sigma + excited electronic state of NO, which is generated under nonequilibrium conditions in the bow shock waves of ascending missiles at 50 to 100 km altitude. A literature survey of the pertinent rate constants and mechanism for use in computer models of the process has been undertaken. Emission from NO has been studied in shock tubes, using shock heated air and other gas mixtures. Collisional quenching of the A2 sigma + state is the reverse of heavy particle excitation of the emission. Its temperature dependence has been studied in a heated cell and a shock tube. An attempt was made to determine the final vibrational state distribution in the ground electronic state, concluding that the NO is transferred into high vibrational levels.


Descriptors :   *ENERGY TRANSFER , *NONEQUILIBRIUM FLOW , *FLUID FLOW , HEAT TRANSFER , REENTRY VEHICLES , TEMPERATURE , SPACECRAFT , ULTRAVIOLET RADIATION , PARTICLES , FLUIDS , ROCKET EXHAUST , SHOCK TUBES , BOW SHOCK , KINETICS , ELECTRONIC STATES , QUENCHING , CHEMICALS , AERODYNAMIC STABILITY , EXCITATION , SHOCK WAVES


Subject Categories : Aerodynamics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE