Structure of flow fields downstream of two different swirl generators

Title:

Structure of flow fields downstream of two different swirl generators

Creator:

Štefan, David, Rudolf, Pavel, Muntean, Sebastian, and Susan-Resiga, Romeo F.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a0ba1718-1dbe-4ff4-8bc8-f42f4b279893
uuid:a0ba1718-1dbe-4ff4-8bc8-f42f4b279893

Subject:

swirl generator, vortex rope, velocity profile, vorticity, and pressure fluctuations

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

This paper discusses the comparison of the flow field downstream of two different swirl generators. Both swirl generators are used to imitate the flow at the exit of the hydraulic turbine runner and study spatio-temporal behaviour of the swirling flow in the draft tube (i.e. outlet diffuser part of the hydraulic turbine), which undergoes breakdown into vortex rope. Unsteady CFD computations are carried out for identical Reynolds number. Resulting velocity and vorticity profiles are correlated with the structure of the vortex rope. Difference in excited pressure pulsations is illustrated on amplitude-frequency spectra of static wall pressure. and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

339-353

Source:

Engineering mechanics: international journal for theoretical and applied mechanics | 2013 Volume:20 | Number:5

Harvested from:

CDK

Metadata only:

false