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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
Strany do
12
Strany počet
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" }