Version 1.2

Version 1.2 - Transonic correction and analytical gradients

This version mainly features a transonic solver and analytical pressure derivatives.

Changes

• Add transonic correction
• Add analytical gradients
• Add feature to deform the body
• Fix calculation of motion-induced velocity and unsteady pressure
• Refactor APIs and utilities

Notes

Transonic correction
The unsteady pressure solution can now be corrected by higher-fidelity data (typically obtained from CFD) to include transonic and viscous effects.
Analytical gradients
Although CoDiPack works well, its memory footprint is too large for practical unsteady cases (see #6). Analytical pressure and aerodynamic forces gradients have therefore been implemented so that flutter constrained optimization can be performed within a reasonable computational time.
Body deformation
The body nodes can now be set to new positions for aeroelastic and optimization purposes.
Formulation fixes
The calculation of the surface velocity induced by a rigid pitching motion has been corrected to use original instead of compressible coordinates. Additionally, a mistake in the calculation of the unsteady pressure coefficient has been fixed.
Refactoring
The default values in the API have been refactored. The slicing utility now also outputs z-coordinates.

Tests

• Ubuntu 22.04 (gcc 11, python 3.10)

sdpm/api/core.py

@@ -17,7 +17,7 @@
 ## Initialize SDPM
 # Adrien Crovato
 
-def initSdpm(cfg, use_ad=False):
+def init_sdpm(cfg, use_ad=False):
     """Initialize SDPM components
 
     Parameters
@@ -82,7 +82,8 @@ def initSdpm(cfg, use_ad=False):
     _pbl.addBody(_bdy)
 
     # Solver
-    _sol = sdpm.Solver(_pbl)
+    vrb = cfg['Verb_lvl'] if 'Verb_lvl' in cfg else 1
+    _sol = sdpm.Solver(_pbl, vrb)
     _adj = sdpm.Adjoint(_sol) if use_ad else None
 
     # Return