Pressure-sensitive-paint measurements in a large-scalecommercial-engine test stand

摘要

This paper presents the application of pressure-sensitive paint(PSP) measurement technology to a large-scale commercial turbine-enginetest stand. In this work, the test article is the engine-inlet bellmouth. A sol-gel-based PSP is applied to the inlet and illuminated usingthe blue (460-nm) output of eleven LED arrays. PSP data are acquiredusing a scientific-grade CCD camera. The application of PSP measurementsin the engine-test-stand environment requires test instrumentation to befixed within a housing located upstream of the test article. Challengesassociated with performing PSP in this hostile environment arediscussed, with focus on the strategies implemented to recoversurface-pressure distributions on the engine-inlet bell mouth