Active Stabilization of Aeromechanical Systems
Abstract
This report details the work on the active control of surge and stall in gas turbine engines. The use of small amplitude waves predicted by theory as stall precursors were tested with experimental data. The nonlinear behavior of such waves was shown to explain much of the data in the literature. This theory was used to design an active stabilization system for rotating stall which was tested on both a single-stage and a three-stage axial compressor, increasing the stable operating range of the single-stage compressor by 25%. The dynamics of the three-stage compressor were shown to match closely with theory. The open- loop forced response characteristics of the compressors were measured and methodology developed in which this data was used to design the compressor control system. The models then developed were used to evaluate alternate control strategies. Engineering of the structural dynamics of the compression system was also shown to be successful in damping rotating stall and surge.... Active control, Compression system flow instabilities, Unsteady flow, Fluid-Structure interaction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 05, 1993
- Accession Number
- ADA261366
Entities
People
- Alan H. Epstein
- Daniel L. Gysling
- Edward M. Greitzer
- John Dugundji
- Vincent H. Garnier
Organizations
- Massachusetts Institute of Technology