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The Effect of Reynolds Number on a Modern Transonic Low-Aspect-Ratio Fan Rotor in a Small Turbofan Engine

Sonoda, Toyotaka and Schnell, Rainer (2013) The Effect of Reynolds Number on a Modern Transonic Low-Aspect-Ratio Fan Rotor in a Small Turbofan Engine. In: Proceedings of the ASME Turbo Expo (GT2013-95447). ASME Turbo Expo 2013, 3.-7. Juni 2013, San Antonio, Texas, USA.

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In this paper, Reynolds effects on a modern transonic low-aspect-ratio fan rotor (Baseline) and the re-designed (optimized) rotor performance are presented with application to a small turbofan engine. The re-design has been done using an in-house numerical optimization system in Honda and the confirmation of the performance was carried out using DLR’s TRACE RANS stage code, assessed with respect to experimental data obtained from a small scale compressor rig in Honda. The baseline rotor performance is evaluated at two Reynolds number conditions, a high Reynolds condition (corresponding to a full engine scale size) and a low Reynolds number condition (corresponding to the small scale compressor rig size), using standard ISA conditions. The performance of the optimized rotor was evaluated at the low Reynolds number condition. The CFD results show significant discrepancies in the rotor efficiency (about 1% at cruise) between these two points due to the different Reynolds numbers. The optimized rotor’s efficiency is increased compared to the baseline. A unique negative curvature region close to the leading edge on the pressure surface of the optimized rotor is one of the reasons why the optimized rotor is superior than the baseline

Item URL in elib:https://elib.dlr.de/82708/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:The Effect of Reynolds Number on a Modern Transonic Low-Aspect-Ratio Fan Rotor in a Small Turbofan Engine
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:June 2013
Journal or Publication Title:Proceedings of the ASME Turbo Expo
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Turbomachinery, Rig Test, Reynolds Effects, Fan
Event Title:ASME Turbo Expo 2013
Event Location:San Antonio, Texas, USA
Event Type:international Conference
Event Dates:3.-7. Juni 2013
Organizer:American Society for Mechanical Engineering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Schnell, Dr.-Ing. Rainer
Deposited On:20 Jun 2013 11:05
Last Modified:20 Jun 2013 11:05

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