An investigation of a constant-bandwidth hot-wire anemometer

A model for a constant-bandwidth hot-wire anemometer and experimental testing of such a anemometer prototype are presented in this article. During the testing, an approximately constant anemometer transmission bandwidth, and good conformity between the model and the real measurement system were achieved. The system developed and outlined herein allows for minimization of the dynamic errors that arise during the measurement of rapidly changing flow velocity fluctuations, in which the mean velocity changes significantly. However, the electronic circuitry needs to be extended, and some additional parameters are required for the anemometer adjustment process. It appears that the results obtained are sufficient for a positive evaluation of the capabilities of the developed measurement system in a wide range of metrological applications.