Application of Doppler and Transit Laser Anemometry in Small Turbomachines,
CRANFIELD INST OF TECH (ENGLAND) SCHOOL OF MECHANICAL ENGINEERING
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This paper discusses the selection and application of laser anemometry systems to the particularly hostile environment found in small high speed rotating turbomachines. There are several different laser anemometry systems which are used in turbomachinery studies. When selecting a system to carry out specific duties it is necessary to have some prior knowledge of the flows to be measured, the spatial resolution required and any limitations on optical access. Optical access will often determine the spatial resolution possible and the quality of the scattered signal will generally determine the type of signal processor which can be used. The criteria used for the selection of systems at Cranfield are discussed. The arrangements in use include both the Doppler and Transit systems each of which are found to have unique and very distinct advantages. The conclusions of the paper are exemplified by measurements of the flows within small high speed compressors.
- Fluid Mechanics
- Test Facilities, Equipment and Methods