The flows generated in several of the TNA facilities have scales of motion smaller than those that can be resolved with most commercially available measurement techniques. The aim of this project is to develop new and advanced techniques to measure velocity, vorticity and density in these flows. Here, we
- provide micro-hot-film and hot-wire probes for velocity measurements with single and multiple sensors that are one order of magnitude smaller than commercially available hot-wire probes,
- provide constant temperature anemometry electronics with a dynamic range one order of magnitude larger than state-of-the-art anemometers,
- Development of a hot-film sensor though microelectronics design and micro-fabrication. Target research infrastructures: CICLoPE, GTF, CoGeoF, LML, RIMT.
- Development of a hot-film sensor calibration methodology including algorithms and a procedure. Target research infrastructures: CICLoPE, GTF, CoGeoF, LML, RIMT.
- Development of direct numerical simulations of the flow around hot-film probes for probe assessment. Target research infrastructures: CICLoPE, GTF, CoGeoF, LML, RIMT.
- Development of very high dynamic range electronics for constant-temperature regulation of hot wires. Target research infrastructures: GReC, GHI, CICLoPE and GTF.
The new probes provide to the TNA facilities unprecedented access to the smallest turbulent scales, because of their high spatial and temporal resolution. Furthermore, the probes provide access to multiple velocity and vorticity components. This is especially important for those facilities with high Reynolds numbers such as CICLoPE (at UNIBO), GTF (at MPI-DS), GReC (at CERN), GHI (at CEA).