Ambient temperature and free stream turbulence effects on the thermal transient anemometer

Abstract

The thermal transient anemometer is a measurement device to obtain area average values of temperature and velocity. Its development was motivated by HVAC (heating, ventilation and air conditioning) and cooling-air circuit automotive development efforts. Analytic considerations, which address utilizing room temperature velocity calibration data in applications with elevated ambient temperatures, have been evaluated and supported by direct experiments. Free stream turbulence levels, as expected for the intended applications, have also been shown to have no effect on the velocity calibrations.

Airfoil Anemometer With Integrated Flexible Piezo-Capacitive Pressure Sensor

“…While thermal anemometers are small and highly accurate, the heated elements are heated continuously, resulting in high energy consumption for remote applications that rely on batteries or harvested energy. They are also susceptible to temperature drift and rapid fluctuations due to turbulent airflow Matova et al (2003); Foss et al (2006).…”