Accession Number : AD0431500


Title :   THERMAL RADIATION FROM THE EXHAUST PLUME OF AN ALUMINIZED COMPOSITE PROPELLANT ROCKET


Descriptive Note : Technical rept.


Corporate Author : TRW SPACE TECHNOLOGY LABS REDONDO BEACH CA


Personal Author(s) : Morizumi, S J ; Carpenter, H J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/431500.pdf


Report Date : Jan 1964


Pagination or Media Count : 42


Abstract : A technique is developed for calculating rocket base heating and spacecraft heating environments due to particle radiation from a single nozzle rocket exhaust plume. The technique has proved successful when applied to a single nozzle exhausting into a rarefied atmosphere on the basis of comparison of predictions with experimental results. The analysis treats radiation from a cloud of particles as that from an equivalent radiating surface. Thus, the problem is reduced to the determination of the proper values of the apparent surface emissivity and the effective temperature. In defining the apparent emissivity of the particle plume, an analogy with neutron scattering for a cylindrical cloud is adopted which shows the apparent emissivity to be dependent on particle emissivity and cloud optical thickness. Since the plume is non-uniform in particle size, concentration, and temperature, certain averaging techniques are used to define values of optical thickness and temperature.


Descriptors :   *EXHAUST FLAMES , *SOLID PROPELLANT ROCKET ENGINES , ALUMINUM COMPOUNDS , SURFACES , PARTICLES , OXIDES , THERMAL RADIATION , EMISSIVITY , STATISTICAL FUNCTIONS , BASE FLOW , EXHAUST GASES , TEMPERATURE , OPTICAL PROPERTIES , HEATING


Subject Categories : Combustion and Ignition


Distribution Statement : APPROVED FOR PUBLIC RELEASE