Detailed velocity and heat transfer measurements of an advanced insert for impingement cooling

This work reports the results of paired experiments for aft section a complex internal cooling flow within gas turbine vane using Magnetic Resonance Velocimetry (MRV) and steady-state Infrared (IR) thermography. The insert with two-pass impingement was designed at scale five times larger than original built stereolithography (SLA) fabrication methods. MRV technique used to measure three-dimensional, three-component velocity field test case Reynolds number range 2,600 7,600 based on diameter holes. Flow distribution, hole performance, cross effects are discussed experiment in which dilute aqueous copper sulfate solution as working fluid. A geometrically similar design employed electrical heating thin stainless steel shim model constant heat flux boundary condition an interior wall vane. modeled then operated air fluid two conditions numbers approximately 1,200 An IR camera surface temperature shim. Using energy balances known flux, data were determine transfer characteristics impinging jets pressure suction side surfaces, including Nusselt number. sets provide detailed insight into distribution result local area-averaged performance. strong coupling between feature serve validation set matched computational simulations. Finally, comparison correlations is presented from Florschuetz et al. [1]. showed lack agreement Florschuetz, leading development novel methodology estimating performance crossflow. Measurement uncertainty estimated be ±5% spatially averaged distributions.