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research-article

Wall temperature measurements in gas turbine combustors with thermographic phosphors

[+] Author and Article Information
Patrick Nau

Institute of Combustion Technology, German Aerospace Center (DLR), 70569 Stuttgart, Germany
patrick.nau@dlr.de

Zhiyao Yin

Institute of Combustion Technology, German Aerospace Center (DLR), 70569 Stuttgart, Germany
Zhiyao.Yin@dlr.de

Oliver Lammel

Institute of Combustion Technology, German Aerospace Center (DLR), 70569 Stuttgart, Germany
oliver.lammel@dlr.de

Wolfgang Meier

Institute of Combustion Technology, German Aerospace Center (DLR), 70569 Stuttgart, Germany
wolfgang.meier@dlr.de

1Corresponding author.

ASME doi:10.1115/1.4040716 History: Received June 22, 2018; Revised June 26, 2018

Abstract

Phosphor thermometry has been developed for wall temperature measurements in gas turbines and gas turbine model combustors. An array of phosphors has been examined in detail for spatially and temporally resolved surface temperature measurements. Two examples are provided, one at high pressure (8 bar) and high temperature and one at atmospheric pressure with high time resolution. To study the feasibility of this technique for full scale gas turbine applications a high momentum confined jet combustor at 8 bar was used. Successful measurements up to 1700 K on a ceramic surface are shown with good accuracy. In the same combustor, temperatures on the combustor quartz walls were measured, which can be used as boundary conditions for numerical simulations. An atmospheric swirl-stabilized flame was used to study transient temperature changes on the bluff body. For this purpose, a high-speed setup (1 kHz) was used to measure the wall temperatures at an operating condition where the flame switches between being attached (M-flame) and being lifted (V-flame) (bistable). The influence of a precessing vortex core (PVC) present during M-flame periods is identified on the bluff body tip, but not at positions further inside the nozzle.

Copyright (c) 2018 by ASME
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