Accession Number : ADA247458


Title :   Orbit Transfer Rocket Engine Technology Program, Advanced Engine Study Task D.6


Descriptive Note : Final rept.,


Corporate Author : ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV


Personal Author(s) : Erickson, C M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a247458.pdf


Report Date : 28 Feb 1992


Pagination or Media Count : 84


Abstract : In Task D.6 of the Advanced Engine Study, three primary subtasks were accomplished: 1) Design and Parametric Data, 2) Engine Requirement Variation Studies, and 3) Vehicle Study/Engine Study Coordination. Parametric data were generated for vacuum thrusts ranging from 7500 lbf to 50000 lbf, nozzle expansion ratios from 600 to 1200, and engine mixture ratios from 5:1 to 7:1. the Failure Modes and Effects Analysis (FMEA) driven baseline design generated in Tasks D.4 and D.5 was used as a departure point for these parametric analyses. These data are intended to assist in vehicle definition and trade studies. In the Engine Requirements Variation Studies, the individual effects of increasing the throttling ratio from 10:1 to 20:1 and requiring the engine to operate at a maximum mixture ratio of 12:1 were determined. Off-design engine balances were generated at these extreme conditions and individual component operating requirements analyzed in detail. Potential problems were identified and possible solutions generated. In the Vehicle Study/Engine Study coordination subtask, vehicle contractor support was provided as needed, addressing a variety of issues uncovered during vehicle trade studies. This support was primarily provided during Technical Interchange Meetings (TIM) in which Space Exploration Initiative (SEI) studies were addressed.


Descriptors :   *THROTTLING , *ENGINES , *THRUST , COMMERCE , VACUUM , CONTRACTORS , FAILURE , HIGH PRESSURE , CYCLES , HYDROGEN , MIXTURES , ADDRESSING , OXYGEN , COMBUSTION , PRESSURE , NOZZLES , EXPANSION , VEHICLES , TRANSFER , PUMPS , BALANCES , SPACE EXPLORATION , RATIOS , ORBITS , REQUIREMENTS , VARIATIONS


Subject Categories : Combustion and Ignition
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE