## Erosion Due to Particle Impingement Upon Bends in Circular Conduits |

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Abrasion by Sand acceleration Air Force Base air stream issuing angle of impingement area of contact bends in circular bulk mean velocity Carbide and Carbon circular conduit Columbia University compressive force exerted constant dependent density directly proportional elastically and perpendicularly equation 21 erosion of bends fly-ash fraction ft-sec given particle impinging particles kinetic energ National Laboratory nozzle pressure number of assumptions number of particles Oak Ridge Operations Office particle and solid particle impinging elastically particle relative plane surface pound of particles pressure of 60 radial velocity radius of area radius of curvature shearing particles simplifying assumptions smaller particles solid particle impinges solid surface solid wall spherical particle impinging Steels to Abrasion Stoker h Substituting equation surface by impinging tangential velocity target U N C L A S S I F I E D U. S. Army Uav2 unit weight USAF utilized for shearing viscosity weight of sand