What is it about?
This paper evaluates the literature surrounding shedding models for internal engine icing, termed "Ice crystal icing". Based on previous works it proposes a comparable framework to model failure, seeing which boundary conditions are the most appropriate and which assumptions can be made. A real-world test case of an isolated engine element is used to demonstrate the model. This element was tested in an icing wind tunnel and evaluated computationally. Good agreement is seen between the predicted shed and an observed shed event.
Featured Image
Photo by erin mckenna on Unsplash
Why is it important?
As we move to design the next generation of ultra-efficient jet engines our architectures will be radically new. Due to this the current method of showing an engine is resistant to icing, the so-called "comparative analysis" won't cut it. As a result, new tools need to be developed to ensure designs are safe: icing is preventable, or at least well controlled. This includes determining shed events so we can design impact-resistant compressors, or remove the ice before it becomes a large threat.
Perspectives
There's been a surprising amount of research from the de-icing community into external aircraft supercooled icing (SLW) shedding, but the ice crystal (ICI) community is lagging. Before this paper, the only model out there was a DEM suggestion by Currie. This work is by no means perfect - but it is a start. The dis-similarities between SLW and ICI shedding are not immediately apparent but may be significant - more research here is definitely required.
Thomas Cross
University of Oxford
Read the Original
This page is a summary of: A Finite Element-Based Fracture Model for the Prediction of Shedding in Ice Crystal Icing, July 2024, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2024-3927.
You can read the full text:
Resources
Contributors
The following have contributed to this page
