Air flows through a rectangular duct having a cross-section of 300 mm width and 200 mm...

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Air flows through a rectangular duct having a cross-section of 300 mm width and 200 mm depth. In order to determine the volume rate of flow of air through the duct experimentally, the cross-section of the duct is divided into a number of imaginary rectangular elements of equal area and the velocity measured at the centre of each element. The results obtained are given below. Distance from top of duct (mm) 20 60 100 140 180 Distance from side of duct (mm) 30 90 150 270 1.6 1.9 2.1 2.0 1.8 210 Velocity (m s) 2.0 2.2 2.0 3.4 6.9 3.7 6.8 10.0 7.0 3.5 7.0 3.8 2.0 2.3 2.1 1.7 2.0 2.3 2.1 1.9 Determine the volume flow rate and the mean velocity of flow in the duct. Air flows through a rectangular duct having a cross-section of 300 mm width and 200 mm depth. In order to determine the volume rate of flow of air through the duct experimentally, the cross-section of the duct is divided into a number of imaginary rectangular elements of equal area and the velocity measured at the centre of each element. The results obtained are given below. Distance from top of duct (mm) 20 60 100 140 180 Distance from side of duct (mm) 30 90 150 270 1.6 1.9 2.1 2.0 1.8 210 Velocity (m s) 2.0 2.2 2.0 3.4 6.9 3.7 6.8 10.0 7.0 3.5 7.0 3.8 2.0 2.3 2.1 1.7 2.0 2.3 2.1 1.9 Determine the volume flow rate and the mean velocity of flow in the duct.

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