Abstract
Adjacent parallel hot-wire anemometers at different temperatures have sometimes been used to measure fluctuating temperatures in turbulent flows. This work presents an extensive experimental comparison of temperatures measured with a parallel-wire probe to temperatures simultaneously measured with a standard cold-wire probe. The results show the parallel-wire probe to work well in low intensity flows with temperature signals which are not too small. However, the parallel-wire probe temperature measurements are not accurate for high turbulence intensities or for small temperature signals, and in general the cold-wire system is probably to be preferred.
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Lienhard V, J.H., Helland, K.N. An experimental analysis of fluctuating temperature measurements using hot-wires at different overheats. Experiments in Fluids 7, 265–270 (1989). https://doi.org/10.1007/BF00198006
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DOI: https://doi.org/10.1007/BF00198006