On the existence of adverse pressure gradient in decelerated swirling flow and its suppression by water jet injection
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F22%3APU147517" target="_blank" >RIV/00216305:26210/22:PU147517 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1755-1315/1079/1/012054/pdf" target="_blank" >https://iopscience.iop.org/article/10.1088/1755-1315/1079/1/012054/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1755-1315/1079/1/012054" target="_blank" >10.1088/1755-1315/1079/1/012054</a>
Alternative languages
Result language
angličtina
Original language name
On the existence of adverse pressure gradient in decelerated swirling flow and its suppression by water jet injection
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
<a href="/en/project/EF16_026%2F0008392" target="_blank" >EF16_026/0008392: Computer Simulations for Effective Low-Emission Energy Engineering</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
IOP Conference Series: Earth and Environmental Science
ISBN
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ISSN
1755-1307
e-ISSN
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Number of pages
12
Pages from-to
1-12
Publisher name
Institute of Physics
Place of publication
neuveden
Event location
Trondheim
Event date
Jun 26, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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