Empirical modeling of urban air mobility rotor icing thrust degradation

Shawn P. Scroger, Jose Palacios, Yiqiang Han

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An empirical model to predict airfoil lift coefficient degradation under icing conditions was developed.The model uses Blade Element Momentum Theory to predict the thrust lost due to a blade section with accreted ice. The model attempts to characterize the lift degradation of a section of the rotor, effectively converting the 3D rotor environment to a 2D problem. The 2D ice accretion was reached by removing all the ice from the blade but a strip of ice at a selected spanwise location. The model was developed using a 14-inch carbon fiber 2 bladed rotor. Accreted ice to the rotor was removed except at 75% of the rotor, spanning +/-1 inch. Baseline lift coefficients were determined empirically using experimental thrust value measured and baseline drag coefficients were acquired from NACA 0015 lookup tables. From 36 experimental cases, the model over-predicted rotor thrust by an average of 33%. Using the Han-Palacios Correlation for the iced drag coefficients, the model under-predicted rotor torque by an average of 37%. These errors were attributed to 3D effects due to the sectional ice left on the rotor being too large for the inherent 2D assumptions used. Smaller ice strips should be used to develop the empirical model and reduce uncertainty.

Original languageEnglish (US)
Title of host publicationAIAA AVIATION 2020 FORUM
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105982
DOIs
StatePublished - 2020
EventAIAA AVIATION 2020 FORUM - Virtual, Online
Duration: Jun 15 2020Jun 19 2020

Publication series

NameAIAA AVIATION 2020 FORUM
Volume1 PartF

Conference

ConferenceAIAA AVIATION 2020 FORUM
CityVirtual, Online
Period6/15/206/19/20

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Energy Engineering and Power Technology

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