Publication detail

Study of Water Jet Collision of High Pressure Flat Jet Nozzles for Hydraulic Descaling

VOTAVOVÁ, H. POHANKA, M.

Original Title

Study of Water Jet Collision of High Pressure Flat Jet Nozzles for Hydraulic Descaling

English Title

Study of Water Jet Collision of High Pressure Flat Jet Nozzles for Hydraulic Descaling

Type

conference paper

Language

en

Original Abstract

One of the most effective methods for descaling hot-rolled steel products is performed using high pressure flat jet nozzles. These descaling nozzles are arranged in rows in hot rolling mills and are set in such a way that each adjoining pair of nozzles creates an overlapping area of water jet streams. Good homogeneity of the pressure distribution over the width of the hot-rolled plate is often used as an indicator of quality of the homogeneity of descaling. The presented laboratory measurements examine one pair of adjoining nozzles with a particular focus on the pressure distribution in the overlapping area. This paper deals with one particular setting of a pair of descaling nozzles with zero offset angles for the jet streams. A measured pressure distribution and an outcome of an erosion test on an aluminum plate are presented and discussed. The erosion test shows that spots with higher pressures do not necessarily result in a higher amount of removed material during an erosion test. The erosion test differs from the expected outcome in such a way that a detailed discussion of this phenomenon is outlined with possible explanations.

English abstract

One of the most effective methods for descaling hot-rolled steel products is performed using high pressure flat jet nozzles. These descaling nozzles are arranged in rows in hot rolling mills and are set in such a way that each adjoining pair of nozzles creates an overlapping area of water jet streams. Good homogeneity of the pressure distribution over the width of the hot-rolled plate is often used as an indicator of quality of the homogeneity of descaling. The presented laboratory measurements examine one pair of adjoining nozzles with a particular focus on the pressure distribution in the overlapping area. This paper deals with one particular setting of a pair of descaling nozzles with zero offset angles for the jet streams. A measured pressure distribution and an outcome of an erosion test on an aluminum plate are presented and discussed. The erosion test shows that spots with higher pressures do not necessarily result in a higher amount of removed material during an erosion test. The erosion test differs from the expected outcome in such a way that a detailed discussion of this phenomenon is outlined with possible explanations.

Keywords

descaling, hydraulic hot rolling, scales, pressure distribution, erosion, surface quality

Released

11.01.2016

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

978-3-03835-700-1

Book

Engineering Mechanics 2015

Pages from

152

Pages to

158

Pages count

7

BibTex


@inproceedings{BUT117923,
  author="Helena {Votavová} and Michal {Pohanka}",
  title="Study of Water Jet Collision of High Pressure Flat Jet Nozzles for Hydraulic Descaling",
  annote="One of the most effective methods for descaling hot-rolled steel products is performed using high
pressure flat jet nozzles. These descaling nozzles are arranged in rows in hot rolling mills and are
set in such a way that each adjoining pair of nozzles creates an overlapping area of water jet streams.
Good homogeneity of the pressure distribution over the width of the hot-rolled plate is often used as an
indicator of quality of the homogeneity of descaling. The presented laboratory measurements examine
one pair of adjoining nozzles with a particular focus on the pressure distribution in the overlapping
area. This paper deals with one particular setting of a pair of descaling nozzles with zero offset angles
for the jet streams. A measured pressure distribution and an outcome of an erosion test on an aluminum
plate are presented and discussed. The erosion test shows that spots with higher pressures do not
necessarily result in a higher amount of removed material during an erosion test. The erosion test
differs from the expected outcome in such a way that a detailed discussion of this phenomenon is
outlined with possible explanations.",
  address="Trans Tech Publications",
  booktitle="Engineering Mechanics 2015",
  chapter="117923",
  doi="10.4028/www.scientific.net/AMM.821.152",
  howpublished="print",
  institution="Trans Tech Publications",
  year="2016",
  month="january",
  pages="152--158",
  publisher="Trans Tech Publications",
  type="conference paper"
}