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Feasibility study on seeding and imaging on a transonic cascade

Klinner, Joachim and Schroll, Michael and Beversdorff, Manfred and Willert, Christian and Cierpka, Christian and Scharnowski, Sven (2011) Feasibility study on seeding and imaging on a transonic cascade. DLR-Interner Bericht, Project Report. AFDAR-D5.3 und DLR-IB 325-04-14, 18 S.

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Official URL: http://www.afdar.eu/

Abstract

The goal of this feasibility study is to assess an existing flow facility, namely a transonic compressor cascade, for possible application of advanced particle image velocimetry (PIV) methods within the current project as part of Task 5.3. Modifications to the facility are recommended and partially already implemented to enable the future application of these techniques there, in particular tomographic PIV and long distance microscopic PIV. The report first introduces the Transonic Cascade Windtunnel (TGK) facility in the context of a recent planar PIV setup and then describes the latest improvements both of a seeding injection device as well as a new purging concept for the light-sheet probe used in the facility. These improvements were essential in enabling successful measurements using conventional PIV (2C-PIV) but will be of direct use for future applications of advanced methods. Within the described 2C-PIV campaign the transonic flow around the leading edge of a highly loaded transonic cascade at M1=1.28 was measured. Exemplary instantaneous and averaged velocity data of this campaign are presented to illustrate the quality improvement in consequence of various modifications. The available measurement data also allow an analysis of the imaging conditions in the presence of strong density gradients within the TCW facility. Furthermore a detailed vibration analysis was carried out in order to examine the spatial and temporal stability of the cascade and the windtunnel (TCW) prior to the high-speed high-resolution PIV measurements. Finally, first suggestions for possible viewing geometries for tomographic PIV are in an effort to find a suitable configuration which maximizes the field of view with respect to a sufficient range of viewing angles.

Item URL in elib:https://elib.dlr.de/88909/
Document Type:Monograph (DLR-Interner Bericht, Project Report)
Additional Information:Forschungsbericht im Rahmen des Forschungsvorhabens EU-FP7/AFDAR (ADVANCED FLOW DIAGNOSTICS FOR AERONAUTICAL RESEARCH)
Title:Feasibility study on seeding and imaging on a transonic cascade
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klinner, Joachimjoachim.klinner (at) dlr.deUNSPECIFIED
Schroll, Michaelmichael.schroll (at) dlr.deUNSPECIFIED
Beversdorff, Manfredmanfred.beversdorff (at) dlr.deUNSPECIFIED
Willert, Christianchris.willert (at) dlr.deUNSPECIFIED
Cierpka, ChristianUni BW MünchenUNSPECIFIED
Scharnowski, SvenUni BW MünchenUNSPECIFIED
Date:1 November 2011
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:18
Status:Published
Keywords:PIV implementation, transonic cascade, light sheet probe, vibration analysis
Institution:DLR Institut für Antriebstechnik
Department:Optische Triebwerksmesstechnik
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Power Plants (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Gasturbine (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Klinner, Joachim
Deposited On:28 Apr 2014 11:41
Last Modified:28 Apr 2014 11:41

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