1.

Which of the following is the correct expression for recovery factor?(a) r=\(\frac{T_i+T}{T_t+T}\)(b) r=\(\frac{T_i-T}{T_t-T}\)(c) r=\(\frac{T_i+T}{T_t-T}\)(d) r=\(\frac{T-T_i}{T+T_t}\)I had been asked this question in an interview for internship.Enquiry is from Measurement of Air Temperature topic in portion Atmosphere and Air Data Measurement of Aircraft Performance

Answer»

The correct choice is (b) R=\(\frac{T_i-T}{T_t-T}\)

To explain: The expression for RECOVERY factor is given by r=\(\frac{T_i-T}{T_t-T}\) where r is KNOWN as recovery factor, TI is known as indicated total temperature, Tt is known as total temperature and T is known as static temperature. The ratio of indicated temperature rise to ideal pressure rise is known as recovery factor.



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