Accession Number:

ADB064202

Title:

Retrieval of Flow-Field Gas Temperature and Concentration in Low-Visibility Propellant Rocket Exhaust Plumes

Descriptive Note:

Interim rept. Oct 1980-Sep 1981

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA

Personal Author(s):

Report Date:

1982-03-01

Pagination or Media Count:

139.0

Abstract:

Estimates have been obtained for the maximum loading level of particles in two-phase rocket exhaust plumes that still allows a reliable determination of flow-field temperature and active gas distribution using gas- only plume retrieval diagnostics. Spatial profiles of emission and absorption transverse to the plume axis and close to the nozzle exit plane were computed for various plume models using a single-scattering band model that correctly couples gas and particle radiation. Retrieval of radial gas temperature and concentration profiles from these transverse profiles were performed with an iterative Abel inversion algorithm designed for purely gaseous plumes. The retrieved profiles were compared with the model profiles to determine the error introduced by ignoring particle effects in inversion. A first-order method for accounting for particle effects was also examined. Results are presented for modeled tactical rocket plumes for candidate low-visibility propellants containing Al2O3H2O, CarbonHCL and ZrO2H2O as the particulategas pairs.

Subject Categories:

  • Combustion and Ignition
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE