This work reports the results of paired experiments of a complex internal cooling flow within a gas turbine vane using Magnetic Resonance Velocimetry (MRV) and steady-state Infrared (IR) thermometry. A scaled model of the Advanced Recirculation Total Impingement Cooling (ARTIC) gas turbine vane insert's leading edge was designed, built using stereolithography (SLA) fabrication methods, and tested using MRV techniques to collect three-dimensional, three-component velocity field data sets for two fully turbulent test cases. Stagnation and recirculation zones were identified and assessed in terms of impact on potential cooling performance.  A paired experiment employed an IR camera to measure the temperature profile data of a thin-sheet, stainless steel impingement surface modeling the ARTIC insert, providing complementary data sets.  The temperature data allow for the calculation of surface heat transfer characteristics, including the Nusselt number distribution for cooling performance analysis to inform design and validate computational models. Quantitative and qualitative comparisons of the paired tests results show strong agreement between flow velocity and cooling performance.  Module-to-module variation in the surface Nusselt number distributions are evident, attributable to the complex interaction between transverse and impinging flows within the apparatus. Finally, a comparison with internal heat transfer correlations is conducted leveraging the detailed data and the work of Florshuetz et. al.


Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using MRV and IR Thermometry

Division / Sponsor:
International Gas Turbine Institute (IGTI)

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2020/volume/84058

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