Combustion

[thschrader]

Dimensions of the body?

[fungnow]

the setup and geometry is in the case above!

RamjetCombustion.FCStd

(18.36 KiB) Downloaded 63 times

trying to sim this jet http://www.luft46.com/misc/skp14.html

[fungnow]

Epiphony: Combustion is a bunch of snakes! Who Knew!?

Using "ReactingFoamTutorial" -> https://www.cfd.at/sites/default/files/ ... Eleven.pdf
and "CFD Tutorial 1 - Elbow" from CSIR as guides!
https://raw.githubusercontent.com/opens ... 0Elbow.pdf
and C:\Users\~~~\FreeCAD 0.19\v2012\msys64\home\ofuser\OpenFOAM\OpenFOAM-v2012\tutorials\combustion\reactingFoam\laminar\counterFlowFlame2D
the ignition is accomplished by an input of mixture of N2 and methane superheated to temp of association (800 K)

back to 3D model using OpenFOAM sheets from above example
https://www.cemf.ir/PDFs/OpenFOAM/Sandi ... ngFoam.pdf
the outer ring enters air 294 K
the middle superheated mix at 1880 K (spark plug)
the inner ring methane 294 K.
However ignition by method from Tutorial above!
is there methane in freeCAD???
so now after meshing and writing case
select "edit" option and hack!

[fungnow]

[video]C:\Users\fungnow(avisom.avi)[/video]
wanted to post short video but cannot find how to do it?????

[adrianinsaval]

[video]C:\Users\fungnow(avisom.avi)[/video]
wanted to post short video but cannot find how to do it?????

upload to youtube or some other hosting service then paste the link here and try using the [video] tag, I'm not sure what sites are supported but I think at least youtube is supported. Maximum file size for attachments in the forum is 1.5mb so you won't be able to post a video here directly, if it's short and audio and image quality are not important you can try converting to a gif that has less than 1.5mb and upload that as an attachment

[chrisb]

The Upload Limit is 1MB.

[fungnow]

Thank you much! Youtube it is, in a while!

[fungnow]

phpBB [video]

[fungnow]

OLT4P_pulse.png (89.12 KiB) Viewed 2369 times

test of pulse fuel inlet , the code was on UTb title "Pulsing Inlet Velocity"

Code: Select all

testing editing CASE before solving
                     ????       use "Analysis control" "Edit" Case button! 
          THIS WILL IMPLEMENT "Pulsing Inlet Velocity" (find it on UTb)
inletGas
    {
        // Fix all three components of velocity on inflow and only the normal component on outflow,
        // in order to be well-posed if there are some faces on the patch which are actually outflows.
        type                fixedNormalInletOutletVelocity;
        fixTangentialInflow yes;
        normalVelocity
        {
            type            uniformFixedValue;
            value           uniform ( 3.2 0.0 0.0 );
            uniformValue sine;
            uniformValueCoeffs
            {
              frequency 2;
              amplitude 5;
              level (10 0 0); 
              scale (1 0 0);  
             }

        }
        value               uniform ( 3.2 0.0 0.0 );
    }