Measurement of Hot-Wire Characteristics as the Function of Flow Temperature and Hot-Wire Temperature

Abstract

For the purpose of applying the fundamental expressionE²=A+BU^0.5of the hot-wire anemometry to the flow accompanied by temperature fluctuations, the hot-wire characteristicsAandBare experimentally determined as the functions of the flow temperature Θ and the hot-wire temperature Θ_w. As the results, in accordance with the analysis based on Kramers' relation (reference 4), it is found that bothAandBare expressed as linear functions with respect to Θ and as quadratic functions with respect to Θ_w.