Accession Number : AD0866551

Title :   Propulsion System Flow Stability Program (Dynamic). Part II. RA-5C Accommodation Control System Analysis.

Descriptive Note : Final technical rept. 1 Oct 68-1 Dec 69 on Phase 2,

Corporate Author : NORTH AMERICAN ROCKWELL CORP LOS ANGELES CA LOS ANGELES DIV

Personal Author(s) : Bayati, Jamal E. ; Tyson, Ray M.

Report Date : FEB 1970

Pagination or Media Count : 263

Abstract : Propulsion systems conventially operate below optimum steady-state performance levels in order that adequate stability margins be available during off-design and transient operation. An ideal 'accommodation' control system would schedule operation for near optimum steady-state performance, and provide additional stability margins only when required to accommodate transients. Such a system has been synthesized for the RA-5C/J79-8 propulsion system. Hybrid computer and digital computer simulation programs were used in defining and checking performance of the accommodation control system. Simulation results show that the digital-computer-centered control system successfully accommodated all the transients to which the propulsion system was subjected. The accommodation control system component requirements are within the current or near-future state of the art. However, the need for development of high temperature sensors with increased dynamic response is indicated. (Author)

Descriptors :   (*RECONNAISSANCE AIRCRAFT, TURBOJET ENGINES), (*TURBOJET ENGINES, AXIAL FLOW COMPRESSORS), (*AXIAL FLOW COMPRESSORS, FLOW SEPARATION), STABILITY, DETECTORS, TRANSIENTS, SCREAMING COMBUSTION, TURBULENCE, INTERACTIONS, MATHEMATICAL MODELS, ANALOG-DIGITAL COMPUTERS, GAS TURBINE ROTORS, TURBOJET INLETS, RESPONSE, COMPUTER PROGRAMMING, ADVANCED WEAPONS.

Subject Categories : Patrol and Reconnaissance Aircraft
      Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE