Accession Number : ADA267949


Title :   Development and Analysis of Startup Strategies for Particle Bed Nuclear Rocket Engine


Descriptive Note : Master's thesis,


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH


Personal Author(s) : Suzuki, David E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267949.pdf


Report Date : Jun 1993


Pagination or Media Count : 105


Abstract : The particle bed reactor (PBR) nuclear thermal propulsion rocket engine concept is the focus of the Air Force's Space Nuclear Thermal Propulsion program. While much progress has been made in developing the concept, several technical issues remain. Perhaps foremost among these concerns is the issue of flow stability through the porous, heated bed of fuel particles. There are two complementary technical issues associated with this concern: the identification of the flow stability boundary and the design of the engine controller to maintain stable operation. This thesis examines a portion of the latter issue which has yet to be addressed in detail. Specifically, it develops and analyzes general engine system startup strategies which maintain stable flow through the PBR fuel elements while reaching the design conditions as quickly as possible. The PBR engine studies are conducted using a computer model of a representative particle bed reactor and engine system. The computer program utilized is an augmented version of SAFSIM, an existing nuclear thermal propulsion modeling code; the augmentation, dubbed SAFSIM+, was developed by the author and provides a more complete engine system modeling tool


Descriptors :   *COMPUTERIZED SIMULATION , *STABILITY , *NUCLEAR PROPULSION , COMPUTER PROGRAMS , AUGMENTATION , BOUNDARIES , PARTICLES , TURBINES , POWER , ROCKET ENGINES , FLUID FLOW , INSTABILITY , INLETS , FLOW , COOLANTS , ENGINES , FUELS , THESES , MODELS , CONTROL


Subject Categories : Nuclear Propulsion


Distribution Statement : APPROVED FOR PUBLIC RELEASE