elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Accessibility | Contact | Deutsch
Fontsize: [-] Text [+]

Rotating Instability in an Annular Cascade: Detailed Analysis of the Instationary Flow Phenomena

Pardowitz, Benjamin and Tapken, Ulf and Sorge, Robert and Thamsen, Paul Uwe and Enghardt, Lars (2013) Rotating Instability in an Annular Cascade: Detailed Analysis of the Instationary Flow Phenomena. ASME Journal of Turbomachinery (Volume). American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4025734. ISSN 0889-504X.

Full text not available from this repository.

Official URL: http://turbomachinery.asmedigitalcollection.asme.org/mobile/article.aspx?articleid=1760267

Abstract

Rotating instability (RI) occurs at off-design conditions in compressors, predominantly in configurations with large tip or hub clearance ratios of s* �> 3%. RI is the source of the blade tip vortex noise and a potential indicator for critical operating conditions like rotating stall and surge. The objective of this paper is to give more physical insight into the RI phenomenon using the analysis results of combined near-field measurements with high-speed particle image velocimetry (PIV) and unsteady pressure sensors. The investigation was pursued on an annular cascade with hub clearance. Both the unsteady flow field next to the leading edge as well as the associated rotating pressure waves were captured. A special analysis method illustrates the characteristic pressure wave amplitude distribution, denoted as “modal events” of the RI. Moreover, the slightly adapted method reveals the unsteady flow structures corresponding to the RI. Correlations between the flow profile, the dominant vortex structures, and the rotating pressure waves were found. Results provide evidence to a new hypothesis, implying that shear layer instabilities constitute the basic mechanism of the RI.

Item URL in elib:https://elib.dlr.de/86205/
Document Type:Article
Title:Rotating Instability in an Annular Cascade: Detailed Analysis of the Instationary Flow Phenomena
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Pardowitz, BenjaminUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tapken, UlfUNSPECIFIEDhttps://orcid.org/0000-0002-0870-1253UNSPECIFIED
Sorge, RobertUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thamsen, Paul UweUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Enghardt, LarsUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:3 September 2013
Journal or Publication Title:ASME Journal of Turbomachinery
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1115/1.4025734
Publisher:American Society of Mechanical Engineers (ASME)
ISSN:0889-504X
Status:Published
Keywords:rotating instability, annular cascade, unsteady compressor aerodynamics
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: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Pardowitz, Benjamin
Deposited On:08 Jan 2014 15:15
Last Modified:06 Nov 2023 15:24

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
OpenAIRE Validator logo electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.