Summary from the 1st AIAA Ice Prediction Workshop

Abstract

The AIAA 1st ice prediction workshop focused on establishing current 2D and 3D simulation capabilities towards ice accretion on aircraft by bringing together scientists from diverse backgrounds such as code developers, experimentalists and users. To that end, experimentally and publicly available rime and glaze ice accretion data were provided for a wide range of applications. The geometries include single and multi-element airfoils, wings, engine inlet and horizontal tail configurations in flow with different droplet size distributions including Supercooled Large Droplets. In addition to ice accretion, data such as pressure distribution, ice mass and collection efficiency were provided, when available. Results from various Computational Fluid Dynamics workflows were provided by academia, research/federal centers and industries. The submitted data is analyzed via code-to-code and code-to-experiment comparison plots. While the many comparisons are now publicly available, the paper presents the detailed analysis on some selected baseline and optional cases. A methodology and technology gap assessment concludes on the current state-of-the-art and presents possible future workshops directions to improve our understanding and modeling of the various phenomena at play. I. Nomenclature= Collection efficiency = Liquid water content = Mean aerodynamic chord = Median volume diameter

Ice Accretion: Image Post-Processing Measurement Techniques for 2D Ice Shapes

“…Generating accurate 3D profiles is more valuable, especially for glaze ice, which produces more variation in the spanwise direction. However, even though technological progress allows for more numerical simulations of 3D profiles than in the past, simulating 2D ice shapes is still common [55,56]. Additionally, conducting experiments on the aerodynamic performance in conventional wind tunnels is also not uncommon using 2D ice shapes extruded in the spanwise direction [10,[57][58][59].…”

Efficient Lagrangian particle tracking algorithms for distributed-memory architectures

“…In addition, it is a test case of the 1st AIAA Ice Prediction Workshop. The hybrid mesh adopted provided as part of the workshop is composed of 16.8M cells (tetrahedra and prisms) and 3.82M nodes [42]. The air and ice conditions are equal to Papadakis et al profile.…”

IGLOO3D simulations of the 1st AIAA Ice-Prediction-Workshop database

“…The interested reader can find further information in the article summarizing the outcomes of the Ice-Prediction-Workshop. 15 There was no liquid water content (LWC) provided for the collection efficiency test-cases. Since only the non-dimensional quantity of deposited water (collection efficiency β) is sought, the value of the LWC does not affect the results.…”

“…These investigations have not been done yet and there is no interest in addressing this case in the present paper. The interested reader is referred to the synthesis paper of the workshop 15 for further information both about the input data and about case 242 results.…”

“…Again, the interested reader will find further information in the synthesis paper of the workshop. 15 The 7-bin droplet size distributions provided by the organizing committee were used for these cases. After equation ( 4), the roughness size was set to 0.91438 mm.…”