[mazhar16823]

Hi,


I was wondering to know how can I include lift and drag coefficient plots in my study, although I know how to create Reports, Monitor Plots and XY plots. But the question is against which quantity those coefficients should be plotted.



As, I did 3D wind turbine simulations, I created the reports and monitor plots for drag and lift coefficients but they can be plotted against the iteration, time step, or other solution variables defined in the respective turbulence model which are not of my interest. Basically those monitor plots only allow to monitor the convergence. However, against which quantity drag/lift should be plotted in XY plots?



Secondly, I also did two airfoils' simulations at two different angles of attack - I have the same confusion about plotting. Any idea?

[fluid23]

You need to ask your question in a different way. I don't think the tools are setup for what you are trying to do. First, explain what you want to plot. I have never seen a definition for a wind turbine lift coefficient. Thrust, drag, (maybe yaw), torque, power. Those are the main parameters of interest for a wind turbine. Lift/drag maybe makes sense if you talk about airfoil section properties but you won't get that out of a 3D analysis of a wind turbine with those reports.

Your second question, is easier to answer. You have two different simulations that calculate a single point on the curve. You have to either import all into one simulation as a table and use and XY plot or (the easier solution) is to tabulate and plot all the data in excel or whatever spreadsheet software you prefer.

[mazhar16823]

Originally Posted by fluid23

You need to ask your question in a different way. I don't think the tools are setup for what you are trying to do. First, explain what you want to plot. I have never seen a definition for a wind turbine lift coefficient. Thrust, drag, (maybe yaw), torque, power. Those are the main parameters of interest for a wind turbine. Lift/drag maybe makes sense if you talk about airfoil section properties but you won't get that out of a 3D analysis of a wind turbine with those reports.

Your second question, is easier to answer. You have two different simulations that calculate a single point on the curve. You have to either import all into one simulation as a table and use and XY plot or (the easier solution) is to tabulate and plot all the data in excel or whatever spreadsheet software you prefer.

Thanks, you are on point. I just figured out that I cannot report the drag coefficient and lift coefficient for a 3D wind turbine and even 2D airfoils (however I can report them against number of iterations to see the cnvergence but not against any other aerodynamic quantity).


Secondly, I think I should run a few simulations on different angles of attack for 2D airfoils and plot lift and drag against respective angles of attack.

[Chris2337]

You can plot the local lift and drag from a force tables I think (its under Tools). https://support.sw.siemens.com/knowl...00023728_EN_US
After the lift and drag are plotted you can export them and normalize each point by its local velocity.