[ygd]

Hi all,

I'm trying to run a transonic flow simulation for RAE2822 airfoil, using the fixed lift mode in SU2 V4.2. Below is what I set up in the configuration file for the compressible freestream definition.

% -------------------- COMPRESSIBLE FREE-STREAM DEFINITION --------------------%
%
% Mach number (non-dimensional, based on the free-stream values)
MACH_NUMBER= 0.734
%
% Activate fixed lift mode (specify a CL instead of AoA, NO/YES)
FIXED_CL_MODE= YES
%
% Target coefficient of lift for fixed lift mode (0.0 by default)
TARGET_CL= 0.824
%
% Iterations to re-evaluate the angle of attack (500 by default)
ITER_FIXED_CL= 500
%
% Lift curve slope for fixed CL mode (0.2 per deg by default)
DCL_DALPHA= 0.2
%
% Free-stream pressure (101325.0 N/m^2 by default, only Euler flows)
FREESTREAM_PRESSURE= 101325.0
%
% Free-stream temperature (288.15 K by default)
FREESTREAM_TEMPERATURE= 288.15
%
% Reynolds number (non-dimensional, based on the free-stream values)
REYNOLDS_NUMBER= 6.5E6
%
% Reynolds length (1 m, 1 inch by default)
REYNOLDS_LENGTH= 1.0

However, when I run the case, it seems that the code does not recognize those setup and treat the flow at fixed AoA (AoA=0 deg), please see attached figure (marked by the red line). Could someone tell me why does this happen? How can I set up to make the fixed lift mode work in SU2? Thanks.