Accession Number : AD0466165


Title :   EXPERIMENTAL HEAT TRANSFER TO HEMISPHERES IN NONEQUILIBRIUM DISSOCIATED HYPERSONIC FLOW WITH SURFACE CATALYSIS AND SECOND-ORDER EFFECTS


Corporate Author : ARO INC ARNOLD AFS TN


Personal Author(s) : Carden, William H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/466165.pdf


Report Date : Jul 1965


Pagination or Media Count : 48


Abstract : An experimental investigation of heat transfer to hemispheres with both catalytic and noncatalytic surfaces in nonequilibrium dissociated hypersonic nitrogen flow has been conducted. The wind tunnel flow conditions provided low Reynolds numbers, allowing the assumption of completely frozen shock and boundary layers while introducing the influences of second-order boundary layer effects such as vorticity interaction. The results for copper surfaces, when correlated using the stagnation point heat transfer equation of Rosner together with Lees' heat transfer distribution, are in good agreement with the secondorder theory of Cheng under the assumption of complete surface recombination of atoms. Reductions in heat transfer rate up to 30 percent were obtained with the use of noncatalytic coatings applied to the probes.


Descriptors :   *FLUID MECHANICS , *HEMISPHERICAL SHELLS , BOUNDARY VALUE PROBLEMS , COATINGS , COPPER , DIOXIDES , ENTHALPY , HEAT TRANSFER , HYPERSONIC FLOW , MONOXIDES , NITROGEN , NITROGEN COMPOUNDS , OXIDES , PHOSPHORIC ACIDS , RECOMBINATION REACTIONS , REYNOLDS NUMBER , SILICON COMPOUNDS , STAGNATION POINT , THERMODYNAMICS , WIND TUNNELS


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE