Publication detail

Comprehensive Study Of Unsteady Pressure Pulsations Induced By The Spiral Vortex Structure In A Conical Diffuser

ŠTEFAN, D. RUDOLF, P. HUDEC, M. HABÁN, V.

Original Title

Comprehensive Study Of Unsteady Pressure Pulsations Induced By The Spiral Vortex Structure In A Conical Diffuser

Type

conference proceedings

Language

English

Original Abstract

The decelerated swirling flow often breaks down into helical structure which is unstable and causes unsteady velocity and pressure fields. The numerical and experimental investigation of this flow pattern is carried out on the experimental apparatus consisting of the swirl generator (source of strong swirling flow) and the conical diffuser (equipped with the series of pressure transducers). The experimental measurements are focused on complex pressure measurements in order to distinguish between synchronous and asynchronous pulsations induced by the vortex structure and examine their changes in relation to the flow rate. The numerical simulations are carried out to visualize vortex shape and compare computed pressure fields with the experimental ones. The open source CFD software OpenFOAM employing realizable k-ɛ turbulence model is used for the numerical simulations. Agreements between numerical end experimental results are discussed.

Keywords

swirling flow, pressure pulsations, diffuser, spiral vortex, OpenFOAM

Authors

ŠTEFAN, D.; RUDOLF, P.; HUDEC, M.; HABÁN, V.

RIV year

2015

Released

9. 9. 2015

Publisher

Faculty of Technologies and Systems

Location

Ljubljana

ISBN

978-961-6770-31-6

Book

Proceedings of 6th IAHR meeting of the Working Group, IAHRWG 2015

Pages from

331

Pages to

338

Pages count

8

URL

http://iahrwg2015.si/files/papers/4_Hydraulic_transient_and_control_systems/IAHR_WG_15_4_9_Stefan.pdf

Full text in the Digital Library

http://hdl.handle.net/11012/70934

BibTex

@proceedings{BUT116583,
  editor="David {Štefan} and Pavel {Rudolf} and Martin {Hudec} and Vladimír {Habán}",
  title="Comprehensive Study Of Unsteady Pressure Pulsations Induced By The Spiral Vortex Structure In A Conical Diffuser",
  year="2015",
  pages="331--338",
  publisher="Faculty of Technologies and Systems",
  address="Ljubljana",
  isbn="978-961-6770-31-6",
  url="http://iahrwg2015.si/files/papers/4_Hydraulic_transient_and_control_systems/IAHR_WG_15_4_9_Stefan.pdf"
}