"Jim Yanik" wrote in message
.. .
"Scet" wrote in
:




Dan, we went through this early last year I think it was and Tarver
was shown to be wrong as per normal. On T56 engines the thermocouples
are connected in parallel and pick up TIT, the signal is then
averaged. They are averaged due to the non-uniform temperatures that
occur at the turbine inlet due to the short time of spraying fuel from
the nozzle, to fuel ignition, to introducing the hot gasses at high
velocity to the turbine inlet. The hot gases are not completely mixed
and so there are some stratifications of hotter and cooler areas at
the turbine inlet. The temperature averaging function of the parallel
thermocouple circuits compensates for these non-uniform temperatures.

I fail to see how the separate thermocouples outputs will be
"averaged",because any individual TC cannot rise in output,as all the
others parallelled will prevent any rise in voltage.Or current would flow
from a higher V to a lower one,just as if you wired batteries of different
voltages together,you end up with circulating currents until all cells are
of equal voltage..

Also, Jim, the "total" is what you want for such small signals. Averaging
would only reduce: accuracy, reliability simplicity.

Scet is just being ignorant.