0
research-article

Implementation of an In-situ Infrared Calibration Method for Precise Heat Transfer Measurements on a Linear Cascade

[+] Author and Article Information
Svenja Aberle

Institute of Jet Propulsion, Universität der Bundeswehr München, Neubiberg, Germany
svenja.aberle@unibw.de

Martin Bitter

Institute of Jet Propulsion, Universität der Bundeswehr München, Neubiberg, Germany
martin.bitter@unibw.de

Reinhard Niehuis

Institute of Jet Propulsion, Universität der Bundeswehr München, Neubiberg, Germany
reinhard.niehuis@unibw.de

Florian Hoefler

GE Global Research, Garching, Germany
florian.hoefler@gmx.de

Jorge Carretero Benignos

GE Global Research, Garching, Germany
jorgcb@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4041132 History: Received February 15, 2018; Revised August 08, 2018

Abstract

For heat transfer measurements on the center blade of a linear cascade, the infrared measurement technique was set up. As a highly challenging condition the angular dependency of the infrared signal was identified. Beside a shallow angle of view, limited by geometric conditions, the curved blade surface necessitated the consideration of this dependency. Therefore, a powerful in-situ calibration method was set up, which accounts for the angular dependency implicitly. The correlation of the measured infrared intensity and the temperature was calibrated by a separate calibration function for each position on the blade. In all, three different calibration approaches were proceeded and assessed. Initial measurements in low-speed test conditions delivered physically more reasonable results, using a local calibration compared to a usual global calibration. By means of these data an evaluation of the aerodynamic behavior of the cascade was enabled. With few modifications, the procedure is capable to deliver high-precision heat transfer measurements in the high-speed cascade wind-tunnel at the Institute of Jet Propulsion.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

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