Stagnation Properties
Stagnation Properties
(OP)
Question about measuring stagnation temperatures: I can use total pressure probes and static pressure probes to measure total and static pressures, and infer the fluid velocity in a pitot-static tube. Is there an analogous measurement for temperatures? Does a thermocouple (or RTD) measure static, or stagnation temperature?
Larry





RE: Stagnation Properties
Yes, but they are far more difficult to get right because there are no simple corrections that can be made without rather comprehensive bench marking on a case by case basis.
Good query
RE: Stagnation Properties
By using temperature sensors like thermocouples or resistance temperature detectors (RTDs) you can measure the temperature of the medium.
Typically, temperature measurement has dead-time (depending on your measurement configuration.
RE: Stagnation Properties
velocity dependent temperatures are involved; the time response is an entirely different matter.
RE: Stagnation Properties
Depending on what you want to measure and the accuracy desired you may need a special probe designed for measuring TAT.
See: Thread1-102277
RE: Stagnation Properties
Thanks for responding. One neat thing about Eng-Tips is that it helps you forumulate the correct question. It's usually easier to get the correct answer that way.....
Larry
RE: Stagnation Properties
all depends on the recovery factor for the well. the indicated temperature indeed is somewhere in between the two limts, but with the process arrangement you've described and the flow velocities you have a more serious problem.
good luck