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Inlet Distortion Sensitivity of Fans with Different Pressure Ratios

Schönweitz, Dirk and Theune, Marius and Schnell, Rainer (2015) Inlet Distortion Sensitivity of Fans with Different Pressure Ratios. 22nd ISABE Conference, 25.-30. Oktober 2015, Phoenix, USA.

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Abstract

The interaction of two different fans with a generic inflow distortion typical for boundary layer ingestion is investigated with regard to aerodynamic effects and operating behavior. The arising results are used to quantify the influence of the total pressure ratio of a rotor on the sensitivity of the specific rotor to in-flow distortions. The employed test cases include the fan of the commercial IAE V2500 engine, an engine of a typical single aisle airplane, and the DLR Fan135 as an example of a low pressure fan for fu-ture ultra high bypass ratio engines. Both fans feature a very similar meridional Mach number but different total pressure ratios. The character of the applied cir-cumferentially inhomogeneous inflow distortion de-manded for the application of a newly developed stream tube based post-processing. This post-processing reveals that the operating point for both fans exceeded the stability limit during the interaction with the inflow distortion. For all investigated quanti-ties, including transient blade forces, operating point excursions and distortion damping during rotor pas-sage, the low pressure fan Fan135 showed a higher sensitivity to the inflow distortion.

Item URL in elib:https://elib.dlr.de/100383/
Document Type:Conference or Workshop Item (Speech)
Title:Inlet Distortion Sensitivity of Fans with Different Pressure Ratios
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schönweitz, DirkAT-FUVUNSPECIFIED
Theune, MariusAT-FUVUNSPECIFIED
Schnell, RainerAT-FUVUNSPECIFIED
Date:May 2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:V2500, Fan135, Inflow Distortion, Inlet Distortion, Boundary Layer Ingestion, BLI, Fan
Event Title:22nd ISABE Conference
Event Location:Phoenix, USA
Event Type:international Conference
Event Dates:25.-30. Oktober 2015
Organizer:Internationl Society on Air Breathing Engines
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Schönweitz, Dirk
Deposited On:14 Dec 2015 09:45
Last Modified:10 May 2016 23:37

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