- 期刊
Development and Assessment of Hot-Film Sensor Technique for the Multistage Turbomachinery Environment
摘要
The slanted hot-film technique has been successfully modified and adapted for flow measurement in the complex and hostile environment encountered in multistage turbomachinery. The sources of probe and prong vibrations and methods of eliminating them are discussed. The incorporation of compressibility corrections and improvements in calibration techniques developed are discussed. The procedure is validated against the data from a five-hole probe. Suggestions are made for improving the accuracy of measurement. The ensemble-averaged data is resolved into time average, blade periodic, blade aperiodic, and non-deterministic velocity components. This is used to model the turbomachinery flow field. The flow is found to be highly complex with appreciable secondary flow in the casing region, and large flow unsteadiness in the suction-casing corner region.