Application of a method for determining the amplitude-frequency response of a constant-resistance hot-wire anemometer using a laser pulse
D.A. Buntin, O.I. Vishnyakov
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: constant resistance thermometer, amplitude-frequency characteristics, hot-wire anemometer sensor, pulsation spectrum
Abstract
This paper continues a series of studies devoted to a method for determining the amplitude-frequency response (AFR) of a constant-resistance hot-wire anemometer based on the direct application of a short-duration pulse to the sensor's sensitive element, simulating the effect as a delta function. The pulse is generated by laser radiation. This method is used to study the influence of parameters such as different settings of the constant-resistance hot-wire anemometer and changes in flow velocity on the AFR. Practical recommendations for selecting the laser radiation intensity/power for accurate frequency response assessment have been developed. A practical application of the method for comparing boundary layer pulsation spectra is demonstrated.
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