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Shvoong Home>Science>Engineering>Impact of a jet Summary

# Impact of a jet

Article Summary   by:chinnuraj     Original Author: chinnuraj

Impact of a jet onto vanes The liquid comes out in the form of a jet from the outlet of a nozzle, which is fitted to a pipe through which the liquid is flowing under pressure. If some plate, fixed or moving, is placed in the path of the jet, a force is exerted by the jet on the plate. This force is called impact of jet, and is obtained from Newton’s second law of motion or from impulse-momentum equation. Force exerted on the inclined plate, moving with a uniform velocity in the direction of a the jet V = absolute velocity of jet of water u = velocity of the plate in the direction of jet a = cross-sectional area of jet θ = angle between the jet and the plate Relative velocity of the jet = V-u Mass of water striking per second = ρa(V-u) If the plate is smooth and loss of energy due to impact of the jet is assumed to be zero, the jet of water will leave the inclined vane with a velocity equal to (V-u). Force exerted by the jet in the direction normal to the plate is given as Fn = Mass striking pr second × (initial velocity in the normal direction with which jet strikes – final velocity) = ρa(V-u)[ (V-u)sin θ – 0)] = ρa(V-u)2sin θ This normal force can be divided into two components namely Fx and Fy in the direction of jet and in a direction perpendicular to the jet respectively. Fx = Fn sin θ = ρa(V-u)2sin2 θ Fy = Fn cos θ = ρa(V-u)2sin θ cos θ Work done per second by the jet on the plate = Fx × (Distance per second in x-direction) = Fx × u = ρa(V-u)2sin2 θ × u = ρa(V-u)2.u.sin2 θ kgf-m/sec or N m/s.
Published: February 09, 2008
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1. Answer   Question  :    impact of jet on flat fixed vertical plate
1. Answer   Question  :    calculation for impact of jet practiacal
1. Answer   Question  :    awsome explanation............ but can u pls elaborate it????
1. Answer   Question  :    what are the instruments needed to perform this experiment in the lab?
1. Answer   Question  :    what is impact
1. Answer  :    with the help of impact testing machine we can check the hardness and efficience of a metal Sunday, September 04, 2011
1. Answer   Question  :    why There is a diffrence between the mass actual and a mass theory that found by claculation by force of water jet?
1. Answer   Question  :    why we use flat plate ? not curve
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