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Unformatted text preview: 1 CE 321 INTRODUCTION TO FLUID MECHANICS Fall 2009 LABORATORY -4: LINEAR MOMENTUM PURPOSE To investigate the interaction between reactive forces and directional changes in momentum flux OBJECTIVE To determine the forces exerted by a vertical rising liquid jet impacting on targets of various shapes. EQUIPMENT REQUIRED Hydraulic Bench, Impact Jet Apparatus, Stopwatch, Targets, Weights In using the momentum equation applied to deflectors we assume the following: • Constant external pressure on the fluid jet so that the pressure in the fluid remains constant as it moves over a deflector • Negligible frictional resistance due to the fluid-deflector interaction so that the relative speed between the deflector surface and the jet stream remains unchanged, a result of Bernoulli’s equation • Negligible lateral spreading of the plane jet • Negligible weight of the control volume (body force) The linear momentum equation for a rising jet impacting on a target plate is: ) cos 1 ( 2 α ρ...
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- Spring '08
- Force, 30°, 90°, 120°, Jet Impact Apparatus, weight pan