Accession Number : AD0689480

Title :   DE-EXCITATION SHOCKS IN A VIBRATIONALLY RELAXING GAS.

Descriptive Note : Technical rept.,

Corporate Author : LEHIGH UNIV BETHLEHEM PA CENTER FOR THE APPLICATION OF MATHEMATICS

Personal Author(s) : Blythe,P. A. ; Petty,D. G. ; Schofield,D. A. ; Wilson,J. L.

Report Date : FEB 1969

Pagination or Media Count : 38

Abstract : Some recent work on the existence of vibrational de-excitation shocks (delta-shocks) in expanding non-equilibrium nozzle flows is extended to include situations in which an adiabatic shock (alpha-shock) may be embedded within the de-excitation shock. A discussion of some further properties of the shock solution is given and some examples are worked out. Numerical solutions of the full equations are also presented. These solutions confirm the existence of the alpha-shocks but bring to light certain anomalies in the simple approximate solution. The modifications necessary to remove these discrepancies are outlined, and the implications of the numerical results are briefly discussed. (Author)

Descriptors :   (*SHOCK WAVES, RELAXATION TIME), (*NOZZLE GAS FLOW, NONEQUILIBRIUM FLOW), EXCITATION, ADIABATIC GAS FLOW, NUMERICAL ANALYSIS, EQUATIONS OF MOTION, VIBRATION

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE