Abstract
A better understanding of unsteady flow phenomena encountered inrotor-stator interactions is a key to further improvements inturbomachinery. Besides CFD methods yielding 3D flow field predictions,time-resolving measurement techniques are necessary to determine theinstantaneous flow quantities of interest. Fast-response aerodynamic probesare a promising alternative to other time-resolving measurement techniquessuch as hot-wire anemometry or laser anemometry.This contribution gives an overview of the fast-response probe measurementtechnique, with the emphasis on the total system and its components, thedevelopment methods, the operation of such systems and the data processingrequirements. A thorough optimization of all system components (such assensor selection and packaging, probe tip construction, probe aerodynamicsand data analysis) is the key of successful development.After description of the technique, examples of applications are given toillustrate its potential. Some remarks will refer to recent experiencesgained by the development and application of the ETH FRAPregsystem.
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