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neelamkumar1988 March 5, 2013 07:37

aerofoil profile
 
I want to import the certain coordinate points of NACA0012 aerofoils. I don't know what is meant by group number and id number given before the corrdinates. i tried to do this by txt file as well as dat file. i used the following points. please suggest me if any. I am using Ansys14 (Design Modeler) :confused:

1 1 66.821565 -17.984475
1 2 66.751436 -17.942434
1 3 66.541054 -17.816674
1 4 66.190436 -17.608268
1 5 65.699598 -17.318992
1 6 65.068629 -16.951339
1 7 64.297629 -16.508455
1 8 63.386808 -15.994166
1 9 62.336476 -15.41292
1 10 61.147109 -14.769779
1 11 59.819337 -14.070358
1 12 58.354064 -13.320814
1 13 56.752409 -12.527762
1 14 55.015852 -11.698265
1 15 53.146215 -10.839753
1 16 51.145708 -9.95996
1 17 49.016984 -9.066873
1 18 46.763166 -8.168651
1 19 44.387895 -7.273564
1 20 41.895325 -6.389901
1 21 39.290145 -5.525901
1 22 36.577642 -4.689679
1 23 33.76362 -3.889127
1 24 30.854511 -3.131867
1 25 27.857243 -2.42513
1 26 24.779318 -1.775717
1 27 21.628709 -1.189896
1 28 18.413908 -0.673361
1 29 15.143808 -0.231149
1 30 11.827708 0.132409
1 31 8.475183 0.413742
1 32 5.096163 0.610072
1 33 1.700708 0.719453
1 34 -1.700979 0.740796
1 35 -5.098597 0.673876
1 36 -8.481891 0.519343
1 37 -11.840691 0.278707
1 38 -15.164964 -0.045671
1 39 -18.444905 -0.45061
1 40 -21.671004 -0.932141
1 41 -24.834095 -1.485556
1 42 -27.925442 -2.105463
1 43 -30.936722 -2.785837
1 44 -33.860126 -3.520092
1 45 -36.688383 -4.301161
1 46 -39.41477 -5.121563
1 47 -42.033118 -5.973482
1 48 -44.537839 -6.848856
1 49 -46.923944 -7.739462
1 50 -49.187006 -8.636995
1 51 -51.323128 -9.533143
1 52 -53.328968 -10.419683
1 53 -55.201675 -11.288551
1 54 -56.938884 -12.131919
1 55 -58.538629 -12.942254
1 56 -59.999377 -13.712411
1 57 -61.31991 -14.435662
1 58 -62.49931 -15.105763
1 59 -63.536948 -15.717022
1 60 -64.432383 -16.264314
1 61 -65.185367 -16.743139
1 62 -65.79579 -17.14965
1 63 -66.263629 -17.480668
1 64 -66.588969 -17.733733
1 65 -66.771939 -17.907094
1 66 -66.812704 -17.999728
1 67 -66.712078 -18.010275
1 68 -66.470912 -17.938092
1 69 -66.089465 -17.784293
1 70 -65.568038 -17.550665
1 71 -64.90697 -17.239655
1 72 -64.106698 -16.854376
1 73 -63.167734 -16.398554
1 74 -62.090708 -15.87652
1 75 -60.876412 -15.293182
1 76 -59.525789 -14.653975
1 77 -58.040028 -13.964842
1 78 -56.420568 -13.232185
1 79 -54.669104 -12.462792
1 80 -52.787698 -11.663829
1 81 -50.77875 -10.842741
1 82 -48.645067 -10.007218
1 83 -46.38988 -9.165114
1 84 -44.016898 -8.324394
1 85 -41.530295 -7.493043
1 86 -38.934737 -6.678998
1 87 -36.235425 -5.890086
1 88 -33.438092 -5.133935
1 89 -30.548973 -4.417893
1 90 -27.574813 -3.748959
1 91 -24.522872 -3.133707
1 92 -21.400899 -2.578219
1 93 -18.217054 -2.088006
1 94 -14.979924 -1.667958
1 95 -11.698457 -1.32228
1 96 -8.381916 -1.054445
1 97 -5.039819 -0.867156
1 98 -1.681862 -0.762307
1 99 1.682133 -0.740965
1 100 5.042252 -0.803351
1 101 8.388624 -0.948844
1 102 11.711468 -1.175984
1 103 15.001079 -1.482481
1 104 18.248051 -1.865255
1 105 21.443194 -2.320464
1 106 24.577677 -2.843551
1 107 27.643012 -3.429292
1 108 30.631184 -4.071864
1 109 33.534598 -4.7649
1 110 36.346193 -5.501576
1 111 39.059362 -6.27466
1 112 41.668088 -7.076624
1 113 44.166842 -7.899686
1 114 46.550659 -8.735925
1 115 48.815089 -9.57734
1 116 50.956171 -10.415924
1 117 52.970451 -11.243758
1 118 54.854928 -12.053078
1 119 56.607043 -12.836341
1 120 58.224619 -13.586295
1 121 59.705829 -14.296028
1 122 61.049213 -14.959065
1 123 62.253541 -15.569363
1 124 63.317874 -16.121411
1 125 64.241452 -16.610234
1 126 65.023708 -17.031455
1 127 65.664206 -17.381309
1 128 66.162659 -17.656693
1 129 66.518826 -17.855151
1 130 66.732581 -17.974934
1 131 66.803842 -18.01498

venkateshaero March 5, 2013 09:31

If you have any geometry tool like UG or ICEM ?

Rachit March 5, 2013 09:48

I think you need to add another column of z coordinates. If you want to plot your 3D curve on the XY plane, then put all 0s in this coulumn. The first column represents the group number, they will all be interpolated by one spline. The second column represents the ID number within the group. So your input file can be something like:

1 1 ......
1 2 ......
1 3 ......
1 4 ......
2 1 ......
2 2 ......
2 3 ......

Also, if you want a sharp trailing edge, add 1 0 in the end. This will close your spline to give a sharp trailing edge.

Regards,
Rachit

Aeronautics El. K. March 5, 2013 12:24

If I were you, I would erase the first 2 columns and I would try again.

neelamkumar1988 March 6, 2013 04:17

thank you all for your reply!!!

farzadpourfattah March 8, 2013 16:49

dear ...
 
you can import Vortex with .txt into icem or gambit or ansys.
if your problem is 2D, put for all points Z=0.
you can do this at Excel then save as .txt and then import to your software.

neelamkumar1988 March 10, 2013 04:12

thank you for your reply!!!


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