Detailed Velocity and Heat Transfer Measurements in an Advanced Gas Turbine Vane Insert Using Magnetic Resonance Velocimetry and Infrared Thermometry

Abstract This work reports the results of paired experiments for a complex internal cooling flow within gas turbine vane using magnetic resonance velocimetry (MRV) and steady-state infrared (IR) thermometry. A scaled model leading edge insert with multi-pass impingement was designed, built stereolithography fabrication methods, tested MRV techniques to collect three-dimensional, three-component velocity field data set fully turbulent test case. Stagnation recirculation zones were identified assessed in terms impact on potential performance. experiment employed an IR camera measure temperature profile thin, heated stainless steel surface modeling inside blade wall cooled by from insert, providing complementary sets. The allow calculation heat transfer (HT) characteristics, including Nusselt number distribution performance analysis inform design validate computational models. Quantitative qualitative comparisons show that are highly coupled. Module-to-module variation distributions is evident, attributable interaction between transverse impinging flows apparatus. Finally, comparison HT correlations conducted Florschuetz et al. [1981, “Streamwiseflow Heat Transfer Distributions Jet Array Impingement With Crossflow,” ASME 1981 International Gas Turbine Conference Products Show, American Society Mechanical Engineers. doi:10.1115/1.3244463]. Measurement uncertainty estimated be approximately ±7% ranging ±3% ±10% number.