A System for Monitoring, Measurement and Analysis of Transient Performance and Stall Phenomena of Gas Turbine Engines

Acceleipation of gas turbine engines pushes the compressor of the engine to the limits of stable operation and may lead to unstable engine conditions with an entire loss of thrust. Therefore, transient performance of turbofan engines has to be considered when designing the engine. A setup for the experimental irivestigation of transient performance and unsteady flow phenomena on a turbofan engine is presented. A procedure for measuring transient pressures with conventional pressure probes is established as well as a method for measuring unsteady temperatures with thermocouples. Ikliniature pressure transducers are incorporated in the: compressors of the engine in order to detect very fast pressure changes. A complex computer system for means of engine control, monitoring and high speed data acquisition was built up. The system was used to evaluate the transient performance characteristics of the two-spool turbofan engine Larzac 04.