Static and Rotating Air/Gas Seal Evaluation

Abstract
The report describes an evaluation of the leakage characteristics of current gas turbine engine air/gas seals and sealing surfaces of small gas turbine engines. The evaluation included definition of probable air/gas leakage sources and paths in an engine possessing variable compressor and power turbine stator geometry, identification of sealing concepts currently in use, prediction of seal leakage in the small engine, rig testing of several static and rotating seals, and analysis of the effect of leakage on small engine performance. The rotating shaft seal tests were conducted on a fin-to-fin labyrinth seal and a carbon face contact seal. The casing flange seal tests were conducted on metal- to-metal surfaces and on four metal seals for flanges. The variable-geometry vane trunnion seal tests were conducted on a fluorocarbon bushing and a metal bushing for the compressor and power turbine locations, respectively. Testing included leakage calibrations, and thermal cyclic and mechanical cyclic operation.

This publication has 0 references indexed in Scilit: