Considerations on axial compressor bleed for sub-idle performance models
| dc.contributor.author | Roig Tió, Ferran | |
| dc.contributor.author | Ferrer-Vidal, Luis E. | |
| dc.contributor.author | Azamar Aguirre, Hasani | |
| dc.contributor.author | Pachidis, Vassilios | |
| dc.date.accessioned | 2021-01-27T16:35:54Z | |
| dc.date.available | 2021-01-27T16:35:54Z | |
| dc.date.issued | 2021-01-11 | |
| dc.description.abstract | The trend towards increased bypass ratio and reduced core size in civil aero-engines puts a strain on ground-start and relight capability, prompting renewed interest in sub-idle performance modelling. While a number of studies have looked at some of the broad performance modelling issues prevalent in this regime, the effects that bleed can have on sub-idle performance have not been addressed in the literature. During start-up and relight, the unknown variation in bleed flows through open handling bleed valves can have a considerable impact on the compressor’s operating line. This paper combines experimental, numerical and analytical approaches to look at the effect that sub-idle bleed flows have on predicted start-up operating lines, along with their effect on compressor characteristics. Experimental whole-engine data along with a purpose-built core-flow analysis tool are used to assess the effect of bleed model uncertainty on engine performance models. An experimental rig is used to assess the effects of reverse bleed on compressor characteristics and measurements are compared against numerical results. Several strategies for the generation of sub-idle maps including bleed effects are investigated. | en_UK |
| dc.description.sponsorship | European Union: Horizon 2020 Clean Sky 2 Joint Undertaking | |
| dc.identifier.citation | Roig Tio F, Ferrer-Vidal LE, Azamar Aguirre H, Pachidis V. (2021) Considerations on axial compressor bleed for sub-idle performance models. In: ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition, 21-25 September 2020, London, Virtual Event. Paper number GT2020-14413 | en_UK |
| dc.identifier.isbn | 978-0-7918-8406-5 | |
| dc.identifier.uri | https://doi.org/10.1115/GT2020-14413 | |
| dc.identifier.uri | https://asmedigitalcollection.asme.org/GT/proceedings/GT2020/84065/Virtual,%20Online/1094348 | |
| dc.identifier.uri | https://dspace.lib.cranfield.ac.uk/handle/1826/16269 | |
| dc.language.iso | en | en_UK |
| dc.publisher | American Society of Mechanical Engineers | en_UK |
| dc.rights | Attribution 4.0 International | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
| dc.subject | compressor | en_UK |
| dc.subject | bleed | en_UK |
| dc.subject | sub-idle | en_UK |
| dc.subject | locked-rotor | en_UK |
| dc.subject | ground start | en_UK |
| dc.subject | windmilling | en_UK |
| dc.subject | performance | en_UK |
| dc.subject | experiment | en_UK |
| dc.subject | CFD | en_UK |
| dc.subject | low-order model | en_UK |
| dc.title | Considerations on axial compressor bleed for sub-idle performance models | en_UK |
| dc.type | Conference paper | en_UK |