Publication detail

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

VOTAVOVÁ, H. POHANKA, M.

Original Title

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

English Title

Study of Water Jets 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 necessairly result in a higher amount of taken material during an erosion test. The erosion test differs from the expected outcome in such a way as to warrant a detailed discussion of this phenomenon with possible explanations outlined.

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 necessairly result in a higher amount of taken material during an erosion test. The erosion test differs from the expected outcome in such a way as to warrant a detailed discussion of this phenomenon with possible explanations outlined.

Keywords

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

RIV year

2015

Released

11.05.2015

Publisher

Institute of Theoretical and Applied Mechanics

Location

Svratka

ISBN

978-80-86246-42-0

Book

ENGINEERING MECHANICS 2015 21st International Conference Engineering Mechanics 2015

Edition

1

Edition number

1

Pages from

354

Pages to

355

Pages count

2

URL

BibTex


@inproceedings{BUT114532,
  author="Helena {Votavová} and Michal {Pohanka}",
  title="Study of Water Jets 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
necessairly result in a higher amount of taken material during an erosion test. The erosion test differs
from the expected outcome in such a way as to warrant a detailed discussion of this phenomenon with
possible explanations outlined.",
  address="Institute of Theoretical and Applied Mechanics",
  booktitle="ENGINEERING MECHANICS 2015
21st International Conference Engineering Mechanics 2015",
  chapter="114532",
  edition="1",
  howpublished="print",
  institution="Institute of Theoretical and Applied Mechanics",
  year="2015",
  month="may",
  pages="354--355",
  publisher="Institute of Theoretical and Applied Mechanics",
  type="conference paper"
}