Does anyone have any ideas how we could measure the full spectrum of total temperature in an air flow up to, say, 100kHz? We know how to get the deterministic or periodic variation due to blade passing and up to 50kHz, but the random turbulent heat transfer u'T' remains ellusive.
Dear Abdul aziz jaafar
Yes I know the group: infact I am the Director! The thermocouples we use work very well using radio telemetry the problem is this is limited to about 3Hz. I want 100kHz! The issue is the thermal inertia of the sensor. Even with tiny thermocouples the maximum possible frequency is less than 1kHz. Using thin film gauges on a suitable substrate of low thermal product and taking data at two different constant currents one can measure periodic total temperature at upto 50kHz (I am named inventor on one such device). But now I want to do better and capture the full spectrum of total temperature at 100 kHz. Any ideas?
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