Power Margin
Because they are essentially devices installed in front of engines, IBFs may contribute to power degradation or ‘installation loss.’ Aerometals has been making use of the latest in computational fluid dynamic (CFD) modeling software to design new IBFs and reduce the installation losses. “In the past, the methodology of designing IBFs was very similar to what is done on automobiles: the more filter area you have, the less impact the filter is going
to have on the engine installation losses,” says John Holland, director of sales at Aerometals. “Through CFD we realized that it is much more complicated than that, and more filter area is not necessarily better. We found this on the H130’s IBF that recently got certified. We reduced the filter area quite dramatically and decreased the installation loss by about 50 percent. Without this engineering technology, we could not really see what was going on
until the systems were installed and tested on the aircraft. In the past, we would just build a filtration system that was as light as possible and mount it in front of the engine as best we could. But with CFD, we have advanced by quantum leaps with respect to design early in the design process. We can really see all the things that impact the air, and make adjustments to clean up the airflow. In the end, this helps us produce much better products for our customers.”
BEFORE:
The older legacy design of the H130 IBF runs through a computational fluid dynamics (CFD) simulation.
Image: Aerometals
AFTER:
The next-gen H130 design that uses the latest generation computational fluid dynamics (CFD) modeling software shows a much more efficient airflow.
Image: Aerometals
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Sept/Oct 2018
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