Accession Number : ADA194160

Title :   Solar Rocket Plume/Mirror Interactions.

Descriptive Note : Final rept. 1 Jan 85-3 Jan 87,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Merkle, Charles L ; Yu, Sheng-Tao

PDF Url : ADA194160

Report Date : Feb 1988

Pagination or Media Count : 152

Abstract : The extent to which the plume from a solar thermal rocket will impinge on the solar collector is studied by flowfield analysis. Such interaction can adversely affect collector performance through fouling, excessive heat loading, or pressure loads that deform the delicate structures. The geometrical shape of the collector is such that only the flow from the nozzle boundary layer can reach it, but the thrust levels of interest lead to very viscous nozzle flows with large, thick boundary layers. Calculations based on continuum theory appear adequate for determining the fraction of the plume that hits the collector, but transitional and rarefied effects are needed to ascertain the details of the distribution along the surface. Results show that both pressure and heat transfer effects are low, but that increase as the chamber pressure or the thrust size is reduced. Keywords: Solar rocket propulsion; Plume/Mirror interactions; Thermal propulsion systems.

Descriptors :   *MIRRORS, *PLUMES, *ROCKET PROPULSION, *SOLAR ROCKETS, BOUNDARY LAYER, CHAMBERS, FLOW FIELDS, FOULING, GEOMETRIC FORMS, HEAT, HEAT TRANSFER, INTERACTIONS, LOADS(FORCES), NOZZLES, PRESSURE, RAREFACTION, SIZES(DIMENSIONS), SOLAR COLLECTORS, THEORY, THERMAL PROPERTIES, THERMAL PROPULSION SYSTEMS, THICKNESS, THRUST, TRANSITIONS, VISCOUS FLOW

Subject Categories : Rockets

Distribution Statement : APPROVED FOR PUBLIC RELEASE