Accession Number:

ADA021958

Title:

Comparison of Electron-Ion Recombination and Gas-Dynamic Expansion Rates in Freely Expanding Helium and Argon Plasmas

Descriptive Note:

Interim rept. 1 Jul 1973-30 Jun 1975

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1976-03-01

Pagination or Media Count:

54.0

Abstract:

Equations coupling the collisional-radiative recombination and gas- dynamic phenomena for the centerline of the freely expanding plume of an argon and helium arcjet are developed and solved for the free electron density. The results of these calculations are used to ascertain the time rates of change of the free electron density attributable to the recombination and gas-dynamic processes separately. Experimental data are presented which support the conclusions drawn from the analytical results. Therefore, based on these results, a more detailed approach than the collisional-radiative recombination model is necessary for the correct description of recombination mechanisms in the rapidly changing environment of the expanding arcjet plume.

Subject Categories:

  • Inorganic Chemistry
  • Nuclear Physics and Elementary Particle Physics
  • Plasma Physics and Magnetohydrodynamics
  • Electric and Ion Propulsion

Distribution Statement:

APPROVED FOR PUBLIC RELEASE