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categoryالهندسة الميكانيكية
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
Air (density = 1.23 kg/m³) flows through an elbow in a rectangular duct as shown in the image. The duct has a width (W) of 0.24
meters, and a depth (into the screen) of 1 meter. All velocities are uniform in the direction into the screen.
You can assume the inlet velocity is uniform (this is reasonable for turbulence), but the sharp bend causes flow to speed up towards
the outside of the bend, causing the linear velocity profile shown in the image. The viscosity of air is low enough such that you can
neglect energy loss caused by friction. Using energy conservation, determine the pressure drop (Pinlet Poutlet) in Pascals for this
situation.
If the image below does not load, you can see it at this link
Uniform inlet
velocity,
V-50 m/s
W
direction
Exit velocity profile: V = 100 ()
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