The Local Aerodynamic Effect due to Miss-Staggering in Variable Stator Vanes

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

Abstract

Multistage axial compressors require variable stator vanes to allow operability over a wide range of operating conditions. The vane profile is therefore restaggered through local rotation around the spindle axis. Multiple vanes of one blade row are linked through a ring and a mechanical gear. Within this mechanism some backlash will be present and will increase over operating time due to wear. This may lead to a deviation of the stagger angle of all vanes of a ring, as well as a local miss-staggering of individual vanes. To investigate the influence of these local deviations on the aerodynamic behavior of the compressor, tests have been conducted in a linear compressor cascade at engine representative Mach numbers. The cascade setup will be introduced and experimental results of stagger angle variation, including a local miss-staggering of the central profile, will be discussed. The tests include an opened and closed staggering of all profiles of the cascade combined with an additional local variation of stagger angle of the central vane to load and unload the vane. To guide the interpretation of the experimental results, numerical simulations using the RANS approach of the cascade setup were performed. Discussion of the experimental and numerical results will reveal the effect on the loss characteristic and turning of the three central vanes and separate the aerodynamic response of the individual vane passages on the local miss-staggering of the central vane.

Details

Original languageEnglish
Title of host publicationASME Turbo Expo 2025: Turbomachinery Technical Conference and Exposition
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume10
ISBN (electronic)978-0-7918-8886-5
Publication statusPublished - 2025
Peer-reviewedYes

Conference

TitleASME Turbomachinery Technical Conference & Exposition 2025
SubtitleArtificial Intelligence & Turbomachinery
Abbreviated titleASME Turbo Expo 2025
Conference number70
Duration16 - 20 June 2025
Degree of recognitionInternational event
LocationRenasant Convention Center
CityMemphis
CountryUnited States of America

External IDs

ORCID /0000-0003-0900-8298/work/194824261

Keywords

ASJC Scopus subject areas

Keywords

  • Axial compressor, miss-staggering, Variable Stator Vanes (VSV)