Dynamic-stress-data management for aeromechanical testing of turbomachinery

Abstract

Aeromechanical testing of turbine engines is an important benchmark in the development of today's modern aircraft propulsion systems, and detailed dynamic-strain gaging of the engine's compressor and turbine are required to provide insight to the integrity of these engine components. Comprehensive real-time visualization of the compressor/turbine dynamic stress is necessary for safe engine operation and rapid posttest data-editing/processing systems are essential for day-to-day test-program direction.

This paper reviews the evolution of on-line data-monitoring and posttest data-processing/analysis techniques that have been utilized at the Arnold Engineering Development Center to support dynamic strain-gage test programs. The transition from hardwire single-channel analog analysis equipment to the incorporation of digital computers for aiding on-line data monitoring, bulk processing of test data, and rapid editing/analysis of test results is discussed. The present on-line monitoring and posttest processing/analysis systems are presented, and refinements for improving the on-line data monitoring and posttest data-processing capabilities are discussed.