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Simulation steps for Axial fan
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Simulation steps for axial fan

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Hi... let me to explain about my Simulation steps...I put all of my Simulation steps for numerical Analysis an axial fan... Also I put all of Contours... B.C. pressure inlet=10 Pa at inlet, turbulent intensity=5 % Hydraulic diameter=0.064 m at outlet, I use pressure-outlet as B.C. and put 0 pa and turbulent intensity=5 % and Hydraulic diameter=0.064 m I Set the backflow turbulence parameters for the flow outlet (pressure-outlet) to the same values used for pressure-inlet. Is it true? Please check all of my steps for simulation and all of contours and commenting... I am not sure my results of simulation are true or not... I do not know how to show the accuracy and validity of the results. I don't access to the experimental data or a good paper to show the accuracy and validity of the results. please help me...thank you...

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3 Comments

30 Files

2 MB Project Size

September 25th, 2017 Uploaded


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pooriya sarmadi
FC Score 7.30

    • 4 Projects

    6 Likes

    36 Downloads

    Tags

    turbomachinery, Simulation,

    Categories

    Mechanical Engineering

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    Atif Masood
    Impeller appears to be rotating in opposite direction. Remove negative sign from rotational velocity (refer to image 5.jpg) and try again.

    on September 26th, 2017

    pooriya sarmadi

     Project Author
    please look at " Simulation steps for Axial fan (2) "... I think very important question is why is the outlet pressure less than the inlet pressure? (https://s3-eu-west-1.amazonaws.com/fetchcfd/resized/file-1506413293313.jpg) Also I do and I try again for your recommendation (Remove negative sign from rotational velocity) and simulation and results does not change... please check contours of pressure... thank you...

    on September 26th, 2017

    Atif Masood
    Yes I already had a look at your "Simulation steps for Axial fan (2)" project and the pressure contours. As you mentioned already that changing the sign does not change the results which is surprising to me. In my opinion it could be due to the boundary conditions you set. One reason could be that your impeller is not rotating fast enough. May be increase the rotational speed to lets say twice the current value. Or alternately, reduce the inlet pressure to lets say half or even smaller value and then rerun the simulations and compare the pressure contours at inlet and outlet.

    on September 26th, 2017

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