Pneumatic probes have been used in a wide variety of reacting and non-reacting flows. The fluctuations in such flows directly affect the accuracy of the mean flow properties extracted from the data. The objective of this paper is to point out, both with a general discussion and a specific example (the five-hole pneumatic probe), the manner in which the fluctuations enter into the data analysis. The procedures outlined can be used as a guide to accounting for the fluctuations when correlations are known or, as more often occurs, to evaluate the experimental errors when the correlations can only be estimated. The error estimates for the five-hole probe measurements in a large-scale compressor indicate that flow near separated regions can cause errors greater than typically quoted values based on steady-state calibration. (Wied)
Use of five-hole pneumatic probe in unsteady flows
Die Anwendung von Fuenf-Bohrungs-Pneumatiksonden bei ungleichfoermigen Stroemungen
1976
12 Seiten, 4 Bilder, 6 Quellen
Conference paper
English
Unsteady Flow-Field Measurements with a Five-Hole Probe
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