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Recent developments and applications of quantitative planar measuring techniques in turbomachinery components

Roehle, I. and Voigt, P. and Schodl, R. and Willert, C. (2000) Recent developments and applications of quantitative planar measuring techniques in turbomachinery components. Measurements Science & Technology, 11 (11), pp. 1023-1035.

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Abstract

Concerning the further development of gas turbine engines, advances of the aero-thermodynamic design can be achieved most efficiently by co-operative efforts aimed at the improvement of both the numerical simulation methods and the experimental test and measurement techniques. Rapid development of numerical capability is accompanied with increasing demands on experimental data. In this context significant instrumentation research efforts are being conducted to develop the needed measurement technologies. Because of the need of reduced experimental costs planar measurement techniques have undergone a rapid pace of development. Three newly developed quantitative light sheet techniques utilizing the scattered light of tracer particles are described in this paper. First a Doppler global velocimetry (DGV) system optimized for time-averaged three component velocity measurements is presented. The system which uses a single viewing direction in conjunction with three different illumination direction enables very accurate velocity measurements. Second a quantitative light sheet technique (QLS) for quantitative mass fraction measurements in mixing processes is treated. To apply the technique the inflow of the mixing experiment must consist at least of two separate flows, one of which can be seeded which the other remains unseeded. DGV and QLS results obtained from experimental investigation in a model combuster are presented. Third a method named tracer based shock visualization (TSV) is described which is capable of determining the shape and structure of shock waves in transonic flows by analyzing the sudden increase of flow density across a shock. Results taken in a transonic compressor are presented.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2001,
Title:Recent developments and applications of quantitative planar measuring techniques in turbomachinery components
Authors:
AuthorsInstitution or Email of Authors
Roehle, I.UNSPECIFIED
Voigt, P.UNSPECIFIED
Schodl, R.UNSPECIFIED
Willert, C.UNSPECIFIED
Date:2000
Journal or Publication Title:Measurements Science & Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:11
Page Range:pp. 1023-1035
Status:Published
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 13:15

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