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Bulk temperature Tf is obtained from total or static temperature?

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Old   March 30, 2011, 05:56
Question Bulk temperature Tf is obtained from total or static temperature?
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Hi, how are you? I have a question for your help.

Assume compressible idea-gas coolant flows into heated channel like turbine blade internal channel. BC: walls are given constant heat flux, inlet is given mass flow and total temperature, outlet is given pressure. Now I want to obtain the heat transfer coefficient, h=q/(Tw-Tf).

Generally the bulk temperature,Tf, is simply averaged by inlet and outlet temperature. Now, I just want to know, do the inlet and outlet temperature be referred to total temperature or static temperature? Or, Tf is averaged by inlet static temperature and outlet total temperature ?

Wall temperature,Tw refer to static temperature? If I choose static, the some of Tw are lower than the Tf.

Please help me charify the problems. Thank you.
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