Aerospace Engineering > GATE 2026 > Fanno Flow
A Mach 1.5 air flow enters a round duct of length 20 cm and diameter 3 cm. If the flow exits with Mach number 1.1, the average Fanning friction factor f of the duct is ________ × 10−3 (rounded off to 1 decimal place).
An excerpt from the Fanno flow table for air is given below.

Correct : 9.4

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Related Topics

Aero duct flow Fanno flow table Mach number 1.5 Mach number 1.1 air flow duct aerospace engineering gate Fanning friction factor GATE Aerospace Engineering 2026 air duct flow calculation

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