Abstract
In order to measure temperature fluctuation accurately in a wall-bounded turbulent shear flow by a fine-wire temperature sensor, we have validated numerically-derived frequency response function and the effects of the velocity fluctuation on the dynamic response of the sensor. As seen in the near-wall region, if the velocity fluctuation is well-correlated with the temperature fluctuation, the temporal variation in time constant causes a bias error in the mean temperature measurement and a slight deterioration in the dynamic response to the fluctuating temperature. We have also appraised the accuracy of a response compensation scheme for the temperature measurements in a turbulent thermal boundary layer based on the present numerical analysis.
