Hot-wire measurements of velocity and temperature fluctuations in a heated turbulent boundary layer

Abstract

Describes the development of a multi-element hot-wire anemometry system designed to measure the fluctuating velocity and temperature in non-isothermal boundary layer flows. This system utilised only standard constant-temperature anemometers and commercially-available sensors. Although the maximum frequency response for the present system was limited by the available signal digitisation rates the probe-anemometry combination itself was shown to be capable of resolving signals to approximately 50 kHz. The performance of the system was evaluated by comparing velocity and temperature statistics measured in an equilibrium turbulent boundary layer flow with similar results from other investigations.