Accession Number : AD0679664

Title :   THEORY ON AFTERBURNING IN A LOW-ALTITUDE ROCKET EXHAUST PLUME.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Lee,Richard Shao-Lin ; Balwanz,W. W.

Report Date : 15 OCT 1968

Pagination or Media Count : 59

Abstract : An improved aerodynamic model is proposed for the exhaust plume issuing from a low-altitude rocket nozzle exit into quiescent ambient air in which chemical reactions and compressibility predominate. The model is based on the presently available knowledge and established aerodynamic principles for the various flow regimes involved. The major assumptions made are individually substantiated by related experimental evidence in existing literature. A theoretical analysis is carried over the whole flow region based on the Karman's integral approach to find solutions for the gross aerodynamic and thermodynamic behavior of the plume. Theory incorporating on empirically derived constants provides the required radial distribution function for the integration. Solutions are obtained for the velocity, density, temperature and chemical composition fields for extended regions of the plume. These results will provide the much needed framework for the understanding of the elements which contribute to the phenomenon of radar attenuation of rocket exhaust plumes. (Author)

Descriptors :   (*EXHAUST GASES, *AFTERBURNING), (*RADAR INTERFERENCE, EXHAUST GASES), AERODYNAMICS, MATHEMATICAL ANALYSIS, VELOCITY, DENSITY, TEMPERATURE

Subject Categories : Active & Passive Radar Detection & Equipment
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE