IDENTIFICATION OF COEFFICIENTS DESCRIBING CONSTANT-RESISTANCE ANEMOMETER

An experimental method for direct determination of coefficients describing constant-resistance anemometer has been presented (Ligeza, 2005, 2007). In contrast to former methods, each of three parameters of the anemometer equation (I-k(2), v(k) and n) is fit independently. The results suggest that the exponent n has a value close to 0.5 and increases when speed of flowing medium decreases. Moreover, it can be shown that the value of the exponent n is relatively insensitive to changes of the anemometer overheating ratio value N.