Publication detail

Enhancement of Centrifugal Compressor Stable Operation by Using of Internal Recirculation Channel

English title

Enhancement of Centrifugal Compressor Stable Operation by Using of Internal Recirculation Channel

Type

journal article - other

Language

en

Original abstract

Centrifugal compressors with high pressure ratio are widely used in small aircraft turbine engines and turbocharges. At high rotational speeds they have narrow stable operating region and commonly used impellers with back swept blades are not able to ensure requested stability. In order to achieve wider stable operating region, some other anti-surge measures can be used, such as an Internal Recirculation Channel (IRC) located in compressor impeller inlet. This article presents the influence of various IRC inlet slot geometry on air flow parameters. The flow velocity profiles downstream the IRC outlet slot are evaluated and influence of various channel configurations on compressor performance map is shown. Results of the experiment together with CFD simulations enable us to analyse the airflow in IRC and find out its most suitable geometry.

English abstract

Centrifugal compressors with high pressure ratio are widely used in small aircraft turbine engines and turbocharges. At high rotational speeds they have narrow stable operating region and commonly used impellers with back swept blades are not able to ensure requested stability. In order to achieve wider stable operating region, some other anti-surge measures can be used, such as an Internal Recirculation Channel (IRC) located in compressor impeller inlet. This article presents the influence of various IRC inlet slot geometry on air flow parameters. The flow velocity profiles downstream the IRC outlet slot are evaluated and influence of various channel configurations on compressor performance map is shown. Results of the experiment together with CFD simulations enable us to analyse the airflow in IRC and find out its most suitable geometry.

Keywords in English

centrifugal compressor, recirculation channel, stability, velocity profiles, experiment, CFD simulation

Released

06.10.2016

Publisher

University of West Bohemia / Západočeská univerzita

Location

Plzeň

ISSN

1802-680X

Pages count

10

BIBTEX


@article{BUT127540,
  author="Miroslav {Růžička},
  title="Enhancement of Centrifugal Compressor Stable Operation by Using of Internal Recirculation Channel",
  year="2016",
  month="October",
  publisher="University of West Bohemia / Západočeská univerzita",
  address="Plzeň",
  issn="1802-680X"
}