FLOWFoil.jl (Flight, Learning, Optimization, and Wind AirFoil Analysis)

FLOWFoil is a collection of two dimensional potential flow solvers (panel methods) for airfoils, airfoil systems, and axisymmetric sections/systems.

The following table includes the list of currently available methods (usage can be found in the docs).

Method	Inviscid Xfoil	Lewis	Martensen	LegacyXfoil	NeuralFoil
Description	A re-derivation of the Xfoil method and implementation in Julia. Currently only the inviscid portions are derived/implemented.	An axisymmetric method, useful for ducts and bodies of revolution.	A periodic method (with optional planar functionality) for axial cascades.	Wrapper of Xfoil.jl	Wrapper of NeuralFoil.jl
Panel Type	Linear Vortex (+ Constant Source)	Constant Vortex	Constant Vortex	Linear Vortex + Constant Source	N/A
Boundary Condition	Dirichlet	Dirichlet	Dirichlet	Dirichlet	N/A
Viscous	🚧	⭕️	⭕️	✅	✅
Single-body Functional	✅	✅	✅	✅	✅
Multi-body Functional	🚧	✅	🚧	❌	❌
Able to model blunt trailing edges	✅	⭕️	⭕️	✅	✅
AD Compatible (ForwardDiff.jl)	✅	✅	✅	❌	✅
References or Wrapped Packages	1, 2	3	3	Xfoil.jl	NeuralFoil.jl

Key:

• ✅ Implemented
• 🚧 Under Development
• ⭕️ Will likely not be implemented
• ❌ Cannot be implemented

References:

1. Fidkowski, K. J., "A Coupled Inviscid-Viscous Airfoil Analysis Solver, Revisited," AIAA Journal, 2021.
2. Drela, M., "XFOIL: An Analysis and Design System for Low Reynolds Number Airfoils," 1989.
3. R. I. Lewis, "Vortex Element Methods for fluid Dynamic Analysis of Engineering Systems," 1991