Question

11. A forced convection system like that used in the lab has been reconfigured for steady-state operation. The solid copper rod is heated with an embedded resistor, and allowed to reach steady state at various input powers. Wind tunnel air velocity and temperature are kept constant throughout the experiment series. A table of input power versus temperature is provided, as well as key system characteristics Compute the convection coefficient experienced by the cylinder in this flow condition. (a) 69.62W/(K-m2) (b) 139.2W/(K-m2) (c) 437.5W/(K m2) (d) 1.461 x 10W(K2) Heating, Q [W] Temperature, T [°C] Quantity Symbol Units Value 20.00 36.00 52.00 68.00 84.00 100.0 Ambient Temperature To Ambient Pressure Copper Density Copper Specific Heat CpK kg) 380.0 Cylinder Diameter Cylinder Length 275.0 mmHg 749.0 24.98 43.49 61.99 80.50 99.01 PCu kg/m3 8.730 x 103 13.72 x 10-3 44.0x 10-

Answer 1

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