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