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/_src/sdpmw.i

@@ -43,6 +43,7 @@ threads="1"
 #include "sdpmSolver.h"
 #include "sdpmSolverTransonic.h"
 #include "sdpmAdjoint.h"
+#include "sdpmGradient.h"
 
 #include "sdpmCppBuf2Py.h"
 
@@ -140,6 +141,7 @@ typedef double sdpmDouble; // needed so that SWIG does not convert sdpmDouble to
 %include "sdpmSolver.h"
 %include "sdpmSolverTransonic.h"
 %include "sdpmAdjoint.h"
+%include "sdpmGradient.h"
 
 %warnfilter(401); // Nothing known about base class 'std::basic_streambuf< char >'
 %include "sdpmCppBuf2Py.h"