Publication detail

Cavitation in Fractal Geometry Orifices

RUDOLF, P. KUBINA, D. HUDEC, M. HOCHMAN, O. POCHYLÝ, F.

Czech title

Kavitace v clonách s fraktální geometrií

English title

Cavitation in Fractal Geometry Orifices

Type

conference paper

Language

en

Original abstract

An experimental research of three types of orifices was carried out in a hydraulic circuit. One-hole orifice and two fractal-shaped orifices (von Koch snowflake, Apollonian gasket) were tested. Fractal-shaped orifices had lower pressure loss in non-cavitating regime. For cavitating conditions, von Koch snowflake orifice maintained the reduced pressure loss, while pressure loss curve within Apollonian gasket orifice gradually aligned with that of one-hole orifice. Dynamics of the cavitating flow behind the orifices featured distinct peak for one-hole orifice connected with shedding of one strong coherent vortical structure, while pressure amplitudes for fractal-shaped orifices (especially von Koch snowflake orifice) were significantly lower. This conclusion is attributed to multiscale behavior of the flow behind the fractal-shaped orifices.

English abstract

An experimental research of three types of orifices was carried out in a hydraulic circuit. One-hole orifice and two fractal-shaped orifices (von Koch snowflake, Apollonian gasket) were tested. Fractal-shaped orifices had lower pressure loss in non-cavitating regime. For cavitating conditions, von Koch snowflake orifice maintained the reduced pressure loss, while pressure loss curve within Apollonian gasket orifice gradually aligned with that of one-hole orifice. Dynamics of the cavitating flow behind the orifices featured distinct peak for one-hole orifice connected with shedding of one strong coherent vortical structure, while pressure amplitudes for fractal-shaped orifices (especially von Koch snowflake orifice) were significantly lower. This conclusion is attributed to multiscale behavior of the flow behind the fractal-shaped orifices.

Keywords in Czech

kavitace; fraktální tvar; hydraulická ztráta; tlakové pulzace

Keywords in English

cavitation; fractal shape; hydraulic loss; pressure pulsations

Released

03.12.2018

Publisher

ASME

ISBN

9780791861851

Book

Proceedings of the 10th Symposium on Cavitation (CAV2018)

Pages from–to

1–5

Pages count

5

BIBTEX


@inproceedings{BUT153419,
  author="Pavel {Rudolf} and Dávid {Kubina} and Martin {Hudec} and Ondřej {Hochman} and František {Pochylý},
  title="Cavitation in Fractal Geometry Orifices",
  booktitle="Proceedings of the 10th Symposium on Cavitation (CAV2018)",
  year="2018",
  month="December",
  pages="1--5",
  publisher="ASME",
  isbn="9780791861851"
}