Daily Arxiv

This is a page that curates AI-related papers published worldwide.
All content here is summarized using Google Gemini and operated on a non-profit basis.
Copyright for each paper belongs to the authors and their institutions; please make sure to credit the source when sharing.

BlendedNet: A Blended Wing Body Aircraft Dataset and Surrogate Model for Aerodynamic Predictions

Created by
  • Haebom

Author

Nicholas Sung, Steven Spreizer, Mohamed Elrefaie, Kaira Samuel, Matthew C. Jones, Faez Ahmed

Outline

BlendedNet is a publicly available aerodynamic dataset for 999 blended wing body (BWB) geometries. Each geometry is simulated under approximately nine flight conditions, generating 8,830 converged RANS cases using the Spalart-Allmaras model and 9 to 14 million cells per case. This dataset is generated by sampling geometric design parameters and flight conditions and contains detailed point-by-point surface data required for lift and drag studies. We also introduce an end-to-end surrogate framework for point-by-point aerodynamic prediction. This pipeline first predicts geometric parameters from sampled surface point clouds using a permutation-invariant PointNet regression model, then conditions a Feature-wise Linear Modulation (FiLM) network on the predicted parameters and flight conditions to predict point-by-point coefficients Cp, Cfx, and Cfz. Experimental results demonstrate low surface prediction errors for various BWB configurations. BlendedNet addresses the lack of data for non-traditional configurations and enables data-driven surrogate modeling research for aerodynamic design.

Takeaways, Limitations

Takeaways:
Providing a large-scale public aerodynamic dataset for non-traditional BWB geometries.
Aerodynamic design research using data-driven surrogate modeling
An effective point-by-point aerodynamic prediction framework utilizing PointNet and FiLM networks is presented.
Accurate surface prediction for various BWB shapes
Limitations:
Includes only RANS simulation results based on the Spalart-Allmaras model
Absence of other aerodynamic models or higher-order simulation results
Further research is needed on the size and diversity of the dataset.
Further validation of the generalization performance of surrogate models is needed.
👍