| 摘要 |
A high pressure water cleaning method and apparatus using a nozzle assembly wherein abrasive particles (172) are separated from a transport gas and injected into a high pressure water spray within an impact and mixing chamber (320) at an incidence angle (MA, MA') and velocity sufficient for the separated particles to penetrate into and thereby mix with a high velocity core (360) of the water spray (FS). The spray pattern is preferably fanned shaped instead of cone shaped, and preferably does not touch at least one outlet passage wall downstream of the impact chamber (320) to provide an exit flow path (AG) for the separated transport gas. For this purpose, an axis (CL) of the spray pattern may be offset (OS) from the center (SC) of the outlet passage (302) of the nozzle assembly, which may be either fixed (280, 285) or rotated (650).
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