Engineering Mechanics

International Conference

Proceedings Vol. 16 (2010)


May 10 – 13, 2010, Svratka, Czech Republic
Editors: Igor Zolotarev

Copyright © 2010 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

ISBN 978-80-87012-26-0 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

Water impact measurement of two overlapping high pressure flat jet nozzles using two different methods
Kvapil J., Pohanka M.
pages 89 - +15p., full text

Descaling of hot rolled plates is typical application for high pressure flat jet nozzles. Row of nozzles with overlapping area at direction of moving hot plate is usually used. Homogeneity of descaling is very important parameter for final quality of the rolled plate. Paper discusses about measurements of impact footprint for single nozzle as well as for two overlapping nozzles. Two different methods were used in measurements. The first method measures impact forces in the free stream. The second method measures impact forces of water stream penetrating through the forming water layer on a test plate. Size of pressure sensor also influences the measurement data. Different dimensions of sensors were used. Measurement data were recalculated by inverse task to so called zero size sensor. Raw measured data as well as sharpened data are presented. The overlapping area is also discussed in this paper.

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