Detail publikace

On the existence of adverse pressure gradient in decelerated swirling flow and its suppression by water jet injection

URBAN, O. RUDOLF, P.

Originální název

On the existence of adverse pressure gradient in decelerated swirling flow and its suppression by water jet injection

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

The paper revisits the theory originally published by Hall that explains the presence of adverse pressure gradient at the axis of a diffuser with swirling flow. It presents the fields of the axial pressure derivative obtained by CFD simulations of flow in a swirl generator, which support the theory. The last part brings cautionary results regarding the suppression of the backflow caused by this adverse pressure gradient by water jet injection. On a case with a strong swirl intensity leading to a strong vortex rope, it is shown that the injected jet may be deflected to the outer walls and rotate with the outer swirling flow, eventually leading to stronger pressure pulsations than in the original state. Further investigation shows that high enough diameter of the jet is needed to ensure its stability.

Klíčová slova

swirling flow; adverse pressure gradient; vortex rope; injection

Autoři

URBAN, O.; RUDOLF, P.

Vydáno

26. 6. 2022

Nakladatel

Institute of Physics

ISSN

1755-1307

Periodikum

IOP Conference Series: Earth and Environmental Science

Ročník

1079

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

12

Strany počet

12

URL

https://iopscience.iop.org/article/10.1088/1755-1315/1079/1/012054/pdf

BibTex

@inproceedings{BUT182652,
  author="Ondřej {Urban} and Pavel {Rudolf}",
  title="On the existence of adverse pressure gradient in decelerated swirling flow and its suppression by water jet injection",
  booktitle="IOP Conference Series: Earth and Environmental Science",
  year="2022",
  series="1079",
  journal="IOP Conference Series: Earth and Environmental Science",
  volume="1079",
  number="1",
  pages="1--12",
  publisher="Institute of Physics",
  doi="10.1088/1755-1315/1079/1/012054",
  issn="1755-1307",
  url="https://iopscience.iop.org/article/10.1088/1755-1315/1079/1/012054/pdf"
}