Abstract: Methods and apparatus for conducting particle erosion tests of vehicle surfaces are disclosed. An example apparatus includes a particle dispersion chamber. The particle dispersion chamber includes a first end and a second end opposite the first end. The example apparatus includes an air supply feed coupled to the first end to provide air flow to the dispersion chamber. The example apparatus includes a first nozzle adjacent the second end. The example apparatus includes an injector extending into the particle dispersion chamber. The injector is to inject particles into the air flow to generate a particle-injected air stream. The first nozzle is to deliver the particle-injected air stream to a test chamber coupled to the first nozzle.

Abstract: Nozzle apparatus and methods for producing a flow stream for ultrasonic testing are disclosed. In one embodiment, a nozzle assembly includes an outerbody and an innerbody disposed within the outerbody. The innerbody includes a first portion adapted to receive a fluid medium radially through a plurality of first baffle apertures into a first chamber, and a second portion adapted to provide a first passage for the fluid medium from the first chamber to a second chamber. The innerbody further includes a third portion adapted to receive the fluid medium radially through a plurality of second baffle apertures into a third chamber, and a fourth portion adapted to provide a second passage for the fluid medium from the third chamber to an exit aperture.

Abstract: A nozzle is adapted to receive an ultrasonic transducer. The nozzle includes a cylindrical plenum chamber. An annular passageway circumscribes the plenum chamber. A porous material forms the annular walls of the plenum chamber and separates the plenum chamber from the passageway. The plenum chamber fluidly communicates with the passageway through the porous material. The passageway fluidly communicates with a supply line that, in turn, fluidly communicates with a pump that supplies water. The plenum chamber has a circular exhaust orifice for the exhaust of water from the nozzle. The plenum chamber contains an unobstructed forming space to facilitate the forming of ultrasonic waves. The diameter of the plenum chamber divided by the diameter of the exhaust orifice is a quotient of at least three.