1.

The recovery factor for computing the static temperature does not account for _____(a) Friction heating(b) Re-radiation(c) Nonisentropic compression(d) Isentropic compressionI got this question during an interview.Query is from Temperature, Angle of Attack and Angle of Side Slip Measurements in section Air Data Systems, Altitude and Heading Reference of Avionics

Answer»

The correct answer is (d) Isentropic compression

The explanation is: The RECOVERY factor of the probe corrects the ORIGINAL MEASURED temperature readings for frictional HEATING in the SKIN, re-radiation from the aircraft to the flow, and nonisentropic compression of air. It is given by η and is measured empirically.



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