Question 3 (8 marks) - Air flows inside a thin-walled pipe of diameter D = 2 cm with a mean velocity um 1.15 m/s. The pi

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Question 3 8 Marks Air Flows Inside A Thin Walled Pipe Of Diameter D 2 Cm With A Mean Velocity Um 1 15 M S The Pi 1 (25.45 KiB) Viewed 26 times

Question 3 (8 marks) - Air flows inside a thin-walled pipe of diameter D = 2 cm with a mean velocity um 1.15 m/s. The pipe is placed horizontally in quiescent air at temperature T 22°C, while the pipe surface temperature is measured at T₁ = 32°C. By evaluating air properties at 27°C and assuming fully developed conditions inside the pipe, determine: (3.1) the inside-surface convection heat-transfer coefficient (hi). (3.2) the outside-surface convection heat-transfer coefficient (ho), and (3.3) the overall heat-transfer coefficient (U). Quiescent air, T Air flow Ts