LDA analysis of swirling flow in a hydro turbine draft tube

Title

LDA analysis of swirling flow in a hydro turbine draft tube

 Author

Shtork, Sergey I. (Novosibirsk State University)
Litvinov, Ivan V. (Novosibirsk State University)
Gorelikov, Evgeny Y. (Novosibirsk State University)
Mitryakov, Andrey S. (Novosibirsk State University)
Hanjalic, K. (TU Delft ChemE/Transport Phenomena)

Date

2018

 Abstract

The work reports on experimental study of flow and pressure pulsations in draft-tube of a laboratory air model of a Francis hydro-turbine operating over a broad range of regimes corresponding to different combinations of the runner rotation speed and flowrates. The velocity measurements using a computer-automated laser-Doppler anemometer and the pressure recording by wall-mounted acoustic sensors for a selection of operating conditions reveal different patterns of the swirling flow, with clearly identifiable regimes with the maximum flow pulsations at non-optimal operating conditions. The regimes with distinct precessing vortex cores show notable rearrangement of the velocity fields, accompanied by an increase in the amplitude of the pressure pulsations, as confirmed by the peaks of the spectra of pressure signals from wall-mounted microphones.

 Subject

Automated LDA
Rapid prototyping
Hydro turbine draft tubes
Precessing vortex core (PVC)

 To reference this document use:

http://resolver.tudelft.nl/uuid:03cd30a3-a69d-4a28-9a6b-c20687f09412

 Event

LXLASER2018: 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, 2018-07-16 → 2018-07-19, Lisbon, Portugal

 Part of collection

Institutional Repository

 Document type

abstract

 Rights

© 2018 Sergey I. Shtork, Ivan V. Litvinov, Evgeny Y. Gorelikov, Andrey S. Mitryakov, K. Hanjalic
Files
PDF Proceedings_LxSymp2018_Final7.pdf 415.89 KB
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