Download - Step1 of 3D Geometry Creation
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Bismillah hir-rahman-nir-rahim.
P1=2.5 bar, v1= 100@12degree, P2=1.9bar(CONVERGED) THANKS GOD!!
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Bismillah-hir-rahman nir-rahim
Start ANSYS10.0Check Structural and FLOTRAN CFD in ANSYS main menu.
Read input file
GUI Path: Auxiliary menu>File>read input from.Browse for input.txt file in the dialogue box.
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ANSYS reads the file and executes the commands written in that file.
input.txt file contains APDL commands
finish
/begin
/prep7
n=107
*dim,x,,n,1
*VREAD,x(1,1),vertices,txt,,IJK,n,1
(1E13.93)
*dim,y,,n,1
*VREAD,y(1,1),vertices,txt,,IJK,n,1
(14x,1E13.9)
k,(1:n),x(1:n),y(1:n)
/PNUM,KP,1
vertices.txt file should also be in the working directory and contains the formated data
(coordinates) of all the keypoints which define a blade.
X(cm) y(cm)
0.6700737E-01 0.2232829E-01
0.6594862E-01 0.2533239E-01
0.6553589E-01 0.2655037E-01
0.6510986E-01 0.2776377E-01
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0.6467076E-01 0.2897250E-01
0.6421872E-01 0.3017645E-01
0.6375380E-01 0.3137549E-01
0.6327598E-01 0.3256944E-01
0.6278516E-01 0.3375811E-01
0.6228116E-01 0.3494124E-01
0.6176370E-01 0.3611856E-01
0.6123244E-01 0.3728971E-01
0.6068692E-01 0.3845429E-01
0.6012656E-01 0.3961180E-01
0.5955069E-01 0.4076166E-01
0.5895845E-01 0.4190319E-01
0.5834884E-01 0.4303553E-01
0.5772064E-01 0.4415766E-01
0.5707237E-01 0.4526831E-01
0.5640225E-01 0.4636591E-01
0.5570809E-01 0.4744846E-01
0.5498732E-01 0.4851347E-01
0.5423714E-01 0.4955796E-01
0.5345453E-01 0.5057836E-01
0.5263624E-01 0.5157036E-010.5177893E-01 0.5252881E-01
0.5087925E-01 0.5344756E-01
0.4993412E-01 0.5431945E-01
0.4894101E-01 0.5513621E-01
0.4789843E-01 0.5588872E-01
0.4680635E-01 0.5656732E-01
0.4566675E-01 0.5716258E-01
0.4448482E-01 0.5766866E-01
0.4326873E-01 0.5808611E-01
0.4202654E-01 0.5841807E-01
0.4076552E-01 0.5866935E-01
0.3949184E-01 0.5884588E-01
0.3821052E-01 0.5895414E-01
0.3692546E-01 0.5900082E-01
0.3563955E-01 0.5899246E-01
0.3435502E-01 0.5893243E-01
0.3307414E-01 0.5881865E-01
0.3179957E-01 0.5864827E-01
0.3053440E-01 0.5841830E-01
0.2928225E-01 0.5812571E-01
0.2804729E-01 0.5776751E-01
0.2683425E-01 0.5734096E-01
0.2564845E-01 0.5684374E-01
0.2449514E-01 0.5627524E-01
0.2337842E-01 0.5563783E-01
0.2230140E-01 0.5493539E-01
0.2126606E-01 0.5417283E-010.2027324E-01 0.5335565E-01
0.1932275E-01 0.5248956E-01
0.1841357E-01 0.5158019E-01
0.1754403E-01 0.5063281E-01
0.1671205E-01 0.4965227E-01
0.1591541E-01 0.4864279E-01
0.1515422E-01 0.4760632E-01
0.1443350E-01 0.4654134E-01
0.1376719E-01 0.4544163E-01
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0.1319575E-01 0.4429038E-01
0.1173195E-01 0.4153319E-01
0.6429343E-01 0.2597883E-01
0.6350845E-01 0.2705855E-01
0.6270913E-01 0.2812770E-01
0.6189552E-01 0.2918601E-01
0.6106749E-01 0.3023309E-01
0.6022479E-01 0.3126839E-01
0.5936699E-01 0.3229121E-01
0.5849350E-01 0.3330066E-01
0.5760349E-01 0.3429558E-01
0.5669591E-01 0.3527449E-01
0.5576939E-01 0.3623549E-01
0.5482234E-01 0.3717625E-01
0.5385338E-01 0.3809443E-01
0.5286145E-01 0.3898774E-01
0.5184588E-01 0.3985407E-01
0.5080649E-01 0.4069166E-01
0.4974364E-01 0.4149927E-01
0.4865820E-01 0.4227628E-01
0.4755156E-01 0.4302276E-010.4642542E-01 0.4373952E-01
0.4531694E-01 0.4448206E-01
0.4418880E-01 0.4519534E-01
0.4301888E-01 0.4583779E-01
0.4181184E-01 0.4640744E-01
0.4057209E-01 0.4690190E-01
0.3930401E-01 0.4731831E-01
0.3801206E-01 0.4765338E-01
0.3670100E-01 0.4790337E-01
0.3537609E-01 0.4806438E-01
0.3404340E-01 0.4813765E-01
0.3270868E-01 0.4813054E-01
0.3137628E-01 0.4805083E-01
0.3004935E-01 0.4790610E-01
0.2872998E-01 0.4770354E-01
0.2741946E-01 0.4744982E-01
0.2611844E-01 0.4715117E-01
0.2482703E-01 0.4681328E-01
0.2354550E-01 0.4643968E-01
0.2227426E-01 0.4603239E-01
0.2101344E-01 0.4559391E-01
0.1976278E-01 0.4512721E-01
0.1852165E-01 0.4463573E-01
0.1728903E-01 0.4412324E-01
0.1606214E-01 0.4359717E-01
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the keypoints look like the figure shown.
Now to draw splines at leading and trailing edge of the blade so that we may Fillet thelines.
GUI Path: Preprocessor> modeling >create>lines>splines>spline through keypoints
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check the radio button in front of Min,Max,Inc
and enter 1,10,1 click Apply.
the B-spline is drawn from kp#1 to kp#10.
Again in the B-spline dialogue box, check List of items and enter 1, then check
Min,Max,Inc and enter 64,70,1 and click ApplyA b-spline is drawn form keypoint 1 through 46 to 70.
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Now zoom in the front edge of the blade by right mouse drag.Draw spline through kp# 55 to kp# 63
And another spline through all the kps between kp#100 and 107 and to the kp#63
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Now to fillet the leading edge of the blade
GUI Path: preprocessor >modeling>create>lines>line fillet
Pick both lines and Apply
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Line fillet dialogue box opensEnter value for fillet radius 1.25e-3 (its in meter units!!)
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The lines after fillet look like this
now fillet line at the trailing edge ,as fillet diameter is 0.0013meter, we enter in fillet radiustab 1.3e-3/2.
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The lines after fillet are shown in figure.
Now delete the splines which were used for creating the fillet, dont delete the lines
GUI Path: preprocessor>delete>lines only
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Pick the lines to be deleted by mouse picking.
To draw concave surface of the blade
Create a spline through the kp# 110,64 to107 and 109
To draw the convex side of the blade create three splines (three!! Because during meshing
we will use quadrilateral meshing elements in the region between the blades)
Create spline using key points 111,3 to 27
Create a spline using key point# 27 to 47
Create a spline using key point# 47 to 61 and 108.
Now the blade profile is ready.
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Now delete all unnecessary key points using command
APDL command: Kdel,all
GUI Path: preprocessor>modeling>delete>keypoints> pick allIgnore any Error or warning messages ! just keep proceeding
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compress keypoint numbersGUI Path: preprocessor>Numbering Ctrls>compress numbers>
In the dbox select keypoints and click OK.
Hurrah !! now there are only six keypoints.
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Now create area of blade
GUI Path: preprocessor> modeling>create>areas>arbitrary>by lines
Check the Loop radio button and pick any line in graphical window by mouse all thelines will be selected and click OK. Blade area is created.
Now copy this area along y axis
GUI Path: preprocessor>modellig>copy>areas>graphically select the area click OK . next in the dialog box enter 6 for number of copies
and 0.04 for DY click OK.
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Six blades are created.
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now copy the concave side line of the uppermost blade a distance of 0.04cm above along y-
axis.
And the convex-side lines of the lower most blade a distance of -0.04cm along y-axis.
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now copy the left-end keypoints of the uppermost and lowermost lines toward the left to
make inlet duct.
Pick keypoints and copy to 24cm i-e 0.24m at an angle of 12 degree.
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now create lines to make inlet duct.
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similarly copy the right-end keypoints of upper and lower most blades toward right hand
side a distance of 12cm at an angle of 60 degree.
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now join these keypoints such that the outlet duct is created.
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Now create the lines between blade passages so that at a later time we can do mapped mesh
in that regular(4-sided) areas.
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now create areas by picking lines using mouse.
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Now to make volume from areas use extrusion technique.
Create two keypoints to define a line along z-axis.Kp,1000,0,0,0
Kp,1001,0,0,0.097
Then
L,1000,1001
Creates 9.7cm line along z-axis.
Now select all the areas and extrude along this line.
GUI path: ansys main menu>modeling>operate>extrude>areas>along lines
select all the areas and then click ok.Then select the line drawn just now.
And click OK.
Volumes will be created.
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until now the geometry is complete.