Variations of fluid properties due to different fluid entry temperatures at different heating levels consequently affect Re. Fine adjustmentsv of m_are frequently performed to compensate such Re deviations from the targeting values due to the temperature-driven fluidproperty variations. The airflow rate (m_ ) is measured by a mass flow meter installed upstream the entry plenum chamber (10). Eight type K thermocouples (14) are installed with equal intervals over the exit plane of the outlet leg to measure fluid exit temper- atures. The average of these eight thermocouple readings (14) is