NASA Technical Reports Server (NTRS) : Static pdf

NASA Technical Reports Server (NTRS) : Static

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The performance of a YF-102 turbofan engine was measured in an outdoor test stand with a bellmouth inlet and seven exhaust-system configurations. The configurations consisted of three separate-flow systems of various fan and core nozzle sizes and four confluent-flow systems of various nozzle sizes and shapes. A computer program provided good estimates of the engine performance and of thrust at maximum rating for each exhaust configuration. The internal performance of two different-shaped core nozzles for confluent-flow configurations was determined to be satisfactory. Pressure and temperature surveys were made with a traversing probe in the exhaust-nozzle flow for some confluent-flow configurations. The survey data at the mixing plane, plus the measured flow rates, were used to calculate the static-pressure variation along the exhaust nozzle length. The computed pressures compared well with experimental wall static-pressure data. External-flow surveys were made, for some confluent-flow configurations, with a large fixed rake at various locations in the exhaust plume

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 11/1/1979
• Year: 1979
• Book Topics/Themes: NASA Technical Reports Server (NTRS), EXHAUST SYSTEMS, NOZZLE GEOMETRY, QUIET ENGINE PROGRAM, SHORT HAUL AIRCRAFT, STATIC FIRING, TURBOFAN ENGINES, COMPUTER PROGRAMS, FLOW VELOCITY, GRAPHS (CHARTS), PRESSURE MEASUREMENT, TABLES (DATA), TEST STANDS, Mcardle, J. G., Homyak, L., Moore, A. S

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