X-ray radiography datasets for tomographic reconstruction of liquid jet breakup dynamics

<p>Impinging jet sprays are commonly used as the means for fuel delivery in liquid rocket engines. Accurate knowledge of the liquid mass distribution, particularly in the optically complex near-field, can allow for improved modeling of this fuel delivery process. These datasets showcase recently collected liquid mass distribution measurements in this region and are an accompanying material to the work entitled “Quantitative polychromatic 4D and monochromatic 2D X-ray tomography of liquid jet breakup dynamics”. The datasets include measurements made from two separate experimental setups—polychromatic tube-source based X-ray imaging and monochromatic synchrotron-based X-ray scanning. The polychromatic beam measurements are included as 2D images collected from three separate cone beam X-ray sources at Zucrow Laboratories in Purdue University, allowing for high-speed tomographic reconstructions of spatiotemporally resolved volumetric data. The monochromatic beam measurements are included as raster-scanned point measurements from a singular line of sight, with additional views gained by translating and rotating the spray across the fixed beam allowing for non-spatiotemporally correlated 2D planar reconstructions from the 7-BM beamline at the Advanced Photon Source synchrotron facility. The measurements are evaluated for two main operating modes of impinging jet sprays, including an open liquid rim and an impact wave condition with typical Reynolds numbers of ~6,700–7,100 and ~10,100–10,600, respectively.</p>

<p>The accompanying journal publication (submission pending) compares the liquid mass distribution measurements made from the two distinct setups. Detailed instructions on how these raw datasets can be converted into quantitative path length measurements and reconstructed into volumetric and planar gridded data can be found in the accompanying GitHub repository (doi: <a href="http://doi.org/10.5281/zenodo.6383545">10.5281/zenodo.6383545</a>). Refer to the README.txt file for usage instructions of this dataset.</p>