An experimental analysis of fluctuating temperature measurements using hot-wires at different overheats |
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Authors: | J H Lienhard V K N Helland |
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Institution: | (1) Dept. of Mechanical Engineering, MIT, 02139 Cambridge, MA, USA;(2) Data Ready, 4647 T Hwy 280 E, Suite 150, 35242 Birmingham, AL, USA |
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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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