Blade Envelopes Part I: Concept and Methodology

@article{Wong2021BladeEP,
  title={Blade Envelopes Part I: Concept and Methodology},
  author={Chun Yui Wong and Pranay Seshadri and A. Scillitoe and Andrew B. Duncan and Geoffrey T. Parks},
  journal={ArXiv},
  year={2021},
  volume={abs/2011.11636}
}
Blades manufactured through flank and point milling will likely exhibit geometric variability. Gauging the aerodynamic repercussions of such variability, prior to manufacturing a component, is challenging enough, let alone trying to predict what the amplified impact of any in-service degradation will be. While rules of thumb that govern the tolerance band can be devised based on expected boundary layer characteristics at known regions and levels of degradation, it remains a challenge to… 
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It is shown that the quality of a manufactured blade can be correlated with features derived from the distribution of primal flow quantities over the surface, and these distributions can be accounted for in the blade envelope using vector-valued models derived from discrete surface flow measurements.
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