A hot wire anemometer was calibrated in an air jet at ambient temperature TO = 26.3 °C and a wire temperature T = 140.0 °C. The anemometer is to be used to measure a flow with a stagnation air temperature of Ta = 31.5 °C. Calculate a correction factor Vc/Vm to minimise the error due to the change in temperature, where Vm is the measured output voltage at test and V is the corrected voltage for which the original calibration should be applied. Provide your answer to three decimal places.
A hot wire anemometer was calibrated in an air jet at ambient temperature TO = 26.3 °C and a wire temperature T = 140.0 °C. The anemometer is to be used to measure a flow with a stagnation air temperature of Ta = 31.5 °C. Calculate a correction factor Vc/Vm to minimise the error due to the change in temperature, where Vm is the measured output voltage at test and V is the corrected voltage for which the original calibration should be applied. Provide your answer to three decimal places.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A hot wire anemometer was
calibrated in an air jet at ambient
temperature TO = 26.3 °C and a
wire temperature T = 140.0 °C.
The anemometer is to be used to
measure a flow with a stagnation
air temperature of Ta = 31.5 °C.
Calculate a correction factor
Vc/Vm to minimise the error due
to the change in temperature,
where Vm is the measured output
voltage at test and V is the
corrected voltage for which the
original calibration should be
applied. Provide your answer to
three decimal places.
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