MEASUREMENT OF VELOCITY AND TEMPERATURE PROFILES IN LOW-SPEED, TURBULENT, NON-ISOTHERMAL FLOWS.

A probe has been developed utilizing thermocouples as sensors which, together with associated data-reduction and processing equipment, makes it possible to measure velocity and temperature profiles in low-speed, turbulent, non-isothermal flows. Preliminary data has been collected for the velocity and temperature profiles in ceiling jets for small fires. The velocity measurements have undergone extensive calibration tests to determine the degree of confidence in these measurements. Calibration results are also included here. This work shows that the technique presented is quite reliable and can predict the mean velocity of turbulent, low-speed, non-isothermal flows within 5% confidence while producing simultaneous mean temperature measurements.