[Throughflow-main] Questions on using SKV

[Oliver B. <oli...@we...>]

Re: Questions on using SKV

Postby boroli » 27 Jun 2012 21:08
You're welcome.

There is a special git branch for centrifugal compressor design of the 
bladedesigner. Please post all further questions regarding the 
bladedesigner at the bladedesigner forum.

Thanks!


Re: Questions on using SKV

Postby mstrocking » 27 Jun 2012 14:31
Hi, thank you for the answers.

Is there an example for a radial compressor for the Blade Designer?


Re: Questions on using SKV

Postby boroli » 22 Jun 2012 14:20
Hi,

you can use the BladeDesigner Software, which has support for creating 
the grid and write out the cgns file with all needed Initial and 
boundary values: http://sourceforge.net/projects/bladedesigner/. You can 
also create manually for each blade row, the input file in ASCII format. 
For the documentation of the parameters, please have a look into the doc 
directory. There is a handbook (written in German). Unfortunately I have 
not the time to translate it for you into English. Maybe some 
translation software will do the job for you.

At the moment I think, the molar mass is hardcoded in daten.cpp. And 
from that the specific gas constant is computed. But it should be 
possible to make this run-time selectable. Cp is initialised in 
Knoten.cpp, but it is possible to use a NASA polynom (coefficents read 
from the cgns file). Cp is the computed in Knoten::update_cp(double T). 
With this cp and R from daten.cpp, kappa is computed in each node.

At least static pressure, Temperature and the velocity should be in the 
output file. Totalpressure is not computed for the moment, but if you 
want it, just comment out the desired lines. Have a look at 
CGNSformat.cpp -> CGNSformat::writeCGNS

In order to visualise the cgns file, we also convert it to vtk and use 
paraview.

Oliver


Questions on using SKV

Postby mstrocking » 20 Jun 2012 13:03
I would like to use the SKV program, but I don't know how
to generate a grid. Should I use some 3rd party program, are there 
examples on this?

How can I put the initial parameters (Omega,r,p,z,sigma,entropie) into a 
CGNS file,
where can I get information on its structure and which editor would you 
suggest?

Also I'm not sure if I understand what the parameters above stand for.
Is it possible to change the gas constant R or to give moll mass in the 
input to SKV?
Is to possible to give the heat capacity c_p in the input?
Is it doable to retrieve Total and Relative Static Pressure and 
Temperature from the output file? I cannot see it in the 'FlowSolution', 
but it seems like it is computed internally in SKV (at least Total 
values are, AFAIK).

What is the preferred way to visualize the data? I'm currently 
converting CGNS to VTK and viewing it in ParaView and HDFView to look 
into the CGNS file.