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I have long been wondering what is the official name of this little air intake tube located in front of the fan blades and its intended functions. I did search it on google but it was in vain. I guess that it may be a pitot tube installed inside a jet engine for gauging the airspeed of the engine intake air.

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    $\begingroup$ It is not a pitot tube because it is open on both ends, and pitot tubes are only open on one end(with the exception of a water drain hole which is several times smaller than the main opening). It is more of a specialized static-pressure port. $\endgroup$
    – Max Power
    Commented Mar 9, 2019 at 22:28

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That's the EPR inlet pressure sensor (there's another one located aft of the engine in the exhaust).

EPR = Engine Pressure Ratio, one way to measure thrust.

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See also:

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One will be the P2 (pressure) sensor, the other will be T2 (temperature)

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    $\begingroup$ This could be improved by explaining the purpose of these sensors. $\endgroup$
    – fooot
    Commented Apr 10, 2019 at 15:29

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