Accession Number : AD0618710

Title :   HETEROGENEOUS COMBUSTION AND SUBLIMATION OF CONES, SPHERES AND WEDGES AT HYPERSONIC SPEEDS,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Gilbert,Leon M. ; Scala,Sinclaire M.

Report Date : JAN 1965

Pagination or Media Count : 48

Abstract : In a previous study (AD-605 199), the aerothermochemical interactions between graphite and dissociated air were examined theoretically for the case of combustion and sublimation near the forward stagnation point of a blunt body. The methods and results of the previous study are extended here to obtain locallysimilar solutions for the combustion and sublimation of graphite at an arbitrary body-station for cones, spheres, wedges and sphere-cone configurations. The boundary layer is treated as a multicomponent chemically reacting gas, including the following nine chemical species: O, O2, N, N2, CO, CO2, CN, C and C3. A separate diffusion equation is considered for each of the species, and the velocity, temperature and concentration profiles are determined throughout the viscous layer for the laminar high Reynolds number flow regime. The local mass transfer rate, the local heat transfer rate, and the local skin friction coefficient are calculated for the different geometries for a wide range of hypersonic environmental conditions, and then these are correlated in terms of stagnation enthalpy, local pressure, local velocity gradient, pressure gradient parameter, and surface temperature. (Author)

Descriptors :   (*GRAPHITE, AERODYNAMIC HEATING), (*COMBUSTION, GRAPHITE), (*SUBLIMATION, GRAPHITE), (*BOUNDARY LAYER, CHEMICAL REACTIONS), HYPERSONIC FLOW, CONICAL BODIES, SPHERES, WEDGES, AIR, DISSOCIATION, OXYGEN, NITROGEN, CARBON COMPOUNDS, MONOXIDES, CARBON DIOXIDE, CYANOGEN, TRANSPORT PROPERTIES, HEAT TRANSFER, FRICTION, ENTHALPY, LAMINAR FLOW

Distribution Statement : APPROVED FOR PUBLIC RELEASE