Configuration of a Heat Transfer Design Verification Test System Using Airfoil Additive Manufacturing

In the process of designing novel high-pressure turbine components, temperature emerges as a pivotal factor, given its profound impact on material stress thresholds and operational life. Hence, it is imperative not only to derive efficient cooling designs but also to establish methods for their effective and reliable validation. In this study, we employed an additive manufacturing (AM) method to fabricate turbine blades and vane specimens that closely resemble the shape of actual components, intended for surface temperature measurements. Additionally, we established a high-temperature test rig equipped with three types of pyrometers for simultaneous acquisition of cooling airfoils surface temperature data. For the AM test specimens, we built channels in both the pressure and suction sides, allowing for the insertion of thermocouples with a 0.8mm diameter from the cooling air supply to the airfoil surface. For the test rig, we configured an annular flow path to accommodate multiple cooling airfoil specimens and established a bypass system capable of supplying high-temperature gas at a flow rate of 3kg/s by combusting liquid fuel. Through these experiments, we were able to compare errors based on measurement methods and obtain data for selecting sensors suitable for observations under different test conditions.