“Natural Aspiration Slots Upstream of Axial Compressor Blades Most Effectively Reduce Undesirable Tip Leakage Flow Effects”

https://pubmed.ncbi.nlm.nih.gov/38114549

The study finds that using natural aspiration slots upstream of axial compressor blades most effectively reduces undesirable tip leakage flow effects, increasing total pressure ratio by 3.5% and surge margin by 3%.