0
research-article

QUASI 2D FLOW-ADAPTIVE ALGORITHM FOR PNEUMATIC PROBE MEASUREMENTS

[+] Author and Article Information
Christian Bartsch

Institute of Jet Propulsion and Turbomachinery RWTH Aachen University Templergraben 55, 52062 Aachen, Germany
christian.bartsch@lhind.dlh.de

Magnus Hölle

Institute of Jet Propulsion and Turbomachinery RWTH Aachen University Templergraben 55, 52062 Aachen, Germany
hoelle@ist.rwth-aachen.de

Peter Jeschke

Institute of Jet Propulsion and Turbomachinery RWTH Aachen University Templergraben 55, 52062 Aachen, Germany
jeschke@ist.rwth-aachen.de

Timo Metzler

MTU Aero Engines AG Dachauer Strasse 665, 80995 Munich, Germany
timo.metzler@mtu.de

1Corresponding author.

ASME doi:10.1115/1.4035745 History: Received August 12, 2016; Revised January 03, 2017

Abstract

The subject of this paper is a flow-adaptive measurement grid algorithm developed for 1D and 2D flow field surveys with pneumatic probes in turbomachinery flows. The algorithm automatically determines the distribution and the amount of measurement points needed for an approximation of the pressure distribution within a predefined accuracy. The algorithm is based on transient traverses, conducted back and forth in the circumferential direction. The dynamic response of the pressure-measuring system is disregarded during the traverses. The performance of the algorithm is - to a large extent - independent of the transient traversing speed and the geometry of the pressure measuring system. Insertion and removal strategies are incorporated in order to reduce measurement points and increase robustness towards differing flow field conditions. The performance of the algorithm is demonstrated for 2D flow field surveys with a pneumatic 5-hole probe in an annular cascade wind tunnel. The measurement grid points are automatically adjusted so that a consistent resolution of the flow features is achieved within the measurement domain. Furthermore, the application of the algorithm shows a significant reduction in the number of measurement points. Compared to the measurement duration based on uniform grids, the duration is reduced by at least 7%, while maintaining a high accuracy of the measurement. The purpose of this paper is to demonstrate the performance of measurement grids adapted to local flow field conditions. Consequently, valuable measurement time can be saved without a loss in quality of the data obtained.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In