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Design of high pressure waterjet nozzlesThe Hydroblast Research Cell at Marshall Space Flight Center is used to investigate the use of high pressure waterjets to strip paint, grease, adhesive and thermal spray coatings from various substrates. Current methods of cleaning often use ozone depleting chemicals (ODC) such as chlorinated solvents. High pressure waterjet cleaning has proven to be a viable alternative to the use of solvents. A popular method of waterjet cleaning involves the use of a rotating, multijet, high pressure water nozzle which is robotically controlled. This method enables rapid cleaning of a large area, but problems such as incomplete coverage and damage to the substrate from the waterjet have been observed. This report summarizes research consisting of identifying and investigating the basic properties of rotating, multijet, high pressure water nozzles, and how particular designs and modes of operation affect such things as stripping rate, standoff distance and completeness of coverage. The study involved computer simulations, an extensive literature review, and experimental studies of different nozzle designs.
Document ID
19950012581
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mazzoleni, Andre P. (Texas Christian Univ. Fort Worth, TX, United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Alabama Univ., Research Reports: 1994 NASA(ASEE Summer Faculty Fellowship Program
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
95N18996
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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