Kiel probe

A Kiel probe is a device for measuring stagnation pressure or stagnation temperature in fluid dynamics. It is a variation of a Pitot probe where the inlet is protected by a "shroud" or "shield." Compared to the Pitot probe, it is less sensitive to changes in yaw angle, and is therefore useful when the probe's alignment with the flow direction is variable or imprecise.[1]

A Kiel probe from the Rockwell-MBB X-31 experimental aircraft

References

Kiel, G. Total Head Meter with Small Sensitivity to Yaw, Technical Memorandum 775 (PDF). Washington, DC: National Advisory Committee for Aeronautics. p. 10. Retrieved 10 December 2014.

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