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NREL's S821 Airfoil (s821-nr) Xfoil prediction polar at RE=1,000,000 Ncrit=5


Details Polar file
Airfoil: NREL's S821 Airfoil (s821-nr)
Reynolds number: 1,000,000
Max Cl/Cd: 75.57 at α=5.5°
Description: Mach=0 Ncrit=5
Source: Xfoil prediction
Download polar: xf-s821-nr-1000000-n5.txt
Download as CSV file: xf-s821-nr-1000000-n5.csv

  
       XFOIL         Version 6.96
  
 Calculated polar for: NREL's S821 Airfoil                             
  
 1 1 Reynolds number fixed          Mach number fixed         
  
 xtrf =   1.000 (top)        1.000 (bottom)  
 Mach =   0.000     Re =     1.000 e 6     Ncrit =   5.000
  
   alpha    CL        CD       CDp       CM     Top_Xtr  Bot_Xtr
  ------ -------- --------- --------- -------- -------- --------
 -17.500  -0.9083   0.10452   0.10118  -0.0580   0.9946   0.1577
 -17.250  -0.9559   0.09523   0.09175  -0.0619   0.9942   0.1610
 -17.000  -0.9924   0.08762   0.08400  -0.0652   0.9938   0.1629
 -16.750  -0.9821   0.08591   0.08228  -0.0663   0.9934   0.1639
 -16.500  -0.9773   0.08349   0.07985  -0.0677   0.9931   0.1649
 -16.250  -0.9826   0.07987   0.07621  -0.0696   0.9927   0.1662
 -16.000  -0.9799   0.07720   0.07351  -0.0711   0.9924   0.1671
 -15.750  -0.9835   0.07377   0.07004  -0.0729   0.9921   0.1683
 -15.500  -0.9860   0.07052   0.06673  -0.0747   0.9917   0.1694
 -15.250  -0.9839   0.06778   0.06395  -0.0763   0.9914   0.1702
 -15.000  -0.9878   0.06434   0.06044  -0.0783   0.9911   0.1712
 -14.750  -0.9821   0.06189   0.05794  -0.0800   0.9907   0.1719
 -14.250  -0.9742   0.05682   0.05277  -0.0833   0.9899   0.1734
 -14.000  -0.9760   0.05492   0.05086  -0.0827   0.9888   0.1744
 -13.750  -0.9792   0.05245   0.04838  -0.0830   0.9877   0.1754
 -13.500  -0.9797   0.05010   0.04600  -0.0836   0.9866   0.1762
 -13.250  -0.9759   0.04805   0.04392  -0.0844   0.9854   0.1770
 -13.000  -0.9702   0.04554   0.04139  -0.0863   0.9837   0.1778
 -12.750  -0.9547   0.04355   0.03936  -0.0888   0.9819   0.1786
 -12.500  -0.9361   0.04149   0.03727  -0.0920   0.9801   0.1794
 -12.250  -0.9177   0.03933   0.03506  -0.0954   0.9787   0.1801
 -12.000  -0.8969   0.03758   0.03328  -0.0984   0.9775   0.1809
 -11.750  -0.8765   0.03573   0.03139  -0.1016   0.9765   0.1816
 -11.500  -0.8540   0.03401   0.02962  -0.1049   0.9756   0.1822
 -11.250  -0.8504   0.03247   0.02805  -0.1046   0.9722   0.1827
 -11.000  -0.8484   0.03080   0.02634  -0.1043   0.9681   0.1830
 -10.750  -0.8328   0.02943   0.02493  -0.1056   0.9657   0.1833
 -10.500  -0.8187   0.02758   0.02306  -0.1079   0.9634   0.1844
 -10.250  -0.7989   0.02596   0.02141  -0.1106   0.9617   0.1852
 -10.000  -0.7779   0.02422   0.01966  -0.1137   0.9603   0.1861
  -9.750  -0.7868   0.02262   0.01803  -0.1113   0.9530   0.1867
  -9.500  -0.7785   0.02109   0.01647  -0.1117   0.9476   0.1874
  -9.250  -0.7586   0.01971   0.01506  -0.1136   0.9445   0.1881
  -9.000  -0.7759   0.01814   0.01345  -0.1096   0.9315   0.1886
  -8.750  -0.7495   0.01698   0.01226  -0.1121   0.9267   0.1894
  -8.500  -0.7398   0.01581   0.01105  -0.1119   0.9140   0.1901
  -8.000  -0.6570   0.01428   0.00945  -0.1205   0.8999   0.1918
  -7.750  -0.6066   0.01372   0.00883  -0.1259   0.8895   0.1924
  -7.500  -0.5642   0.01327   0.00827  -0.1296   0.8702   0.1931
  -7.250  -0.5330   0.01296   0.00784  -0.1311   0.8459   0.1935
  -7.000  -0.5072   0.01273   0.00749  -0.1314   0.8223   0.1939
  -6.750  -0.4829   0.01254   0.00719  -0.1313   0.8003   0.1943
  -6.500  -0.4584   0.01238   0.00693  -0.1312   0.7815   0.1946
  -6.250  -0.4345   0.01215   0.00661  -0.1311   0.7625   0.1955
  -6.000  -0.4091   0.01193   0.00633  -0.1311   0.7455   0.1964
  -5.750  -0.3831   0.01174   0.00608  -0.1312   0.7306   0.1973
  -5.500  -0.3573   0.01159   0.00586  -0.1312   0.7153   0.1982
  -5.250  -0.3300   0.01143   0.00567  -0.1314   0.7013   0.1991
  -5.000  -0.3030   0.01131   0.00550  -0.1314   0.6882   0.2001
  -4.750  -0.2756   0.01119   0.00533  -0.1315   0.6745   0.2010
  -4.500  -0.2475   0.01108   0.00518  -0.1317   0.6637   0.2018
  -4.250  -0.2193   0.01098   0.00504  -0.1319   0.6523   0.2026
  -4.000  -0.1911   0.01089   0.00491  -0.1321   0.6416   0.2034
  -3.750  -0.1626   0.01081   0.00478  -0.1322   0.6294   0.2041
  -3.500  -0.1343   0.01075   0.00467  -0.1324   0.6186   0.2048
  -3.250  -0.1052   0.01067   0.00456  -0.1326   0.6085   0.2054
  -3.000  -0.0768   0.01063   0.00447  -0.1327   0.5987   0.2060
  -2.750  -0.0472   0.01056   0.00438  -0.1330   0.5902   0.2064
  -2.500  -0.0182   0.01048   0.00426  -0.1332   0.5803   0.2075
  -2.250   0.0112   0.01039   0.00416  -0.1335   0.5713   0.2088
  -2.000   0.0406   0.01032   0.00407  -0.1337   0.5611   0.2102
  -1.750   0.0696   0.01028   0.00399  -0.1339   0.5517   0.2116
  -1.500   0.0996   0.01021   0.00392  -0.1342   0.5440   0.2130
  -1.250   0.1289   0.01017   0.00387  -0.1343   0.5354   0.2143
  -1.000   0.1583   0.01014   0.00382  -0.1345   0.5278   0.2154
  -0.750   0.1881   0.01011   0.00378  -0.1347   0.5199   0.2165
  -0.500   0.2170   0.01012   0.00374  -0.1347   0.5106   0.2176
  -0.250   0.2466   0.01010   0.00371  -0.1349   0.5033   0.2185
   0.000   0.2762   0.01009   0.00369  -0.1350   0.4959   0.2193
   0.250   0.3055   0.01008   0.00366  -0.1351   0.4881   0.2212
   0.500   0.3353   0.01005   0.00363  -0.1353   0.4815   0.2231
   0.750   0.3650   0.01003   0.00362  -0.1354   0.4739   0.2249
   1.000   0.3940   0.01005   0.00362  -0.1354   0.4660   0.2268
   1.250   0.4236   0.01005   0.00363  -0.1355   0.4601   0.2288
   1.500   0.4530   0.01007   0.00364  -0.1355   0.4525   0.2306
   1.750   0.4809   0.01015   0.00367  -0.1353   0.4418   0.2321
   2.000   0.5103   0.01016   0.00368  -0.1353   0.4327   0.2342
   2.250   0.5384   0.01023   0.00372  -0.1351   0.4217   0.2368
   2.500   0.5674   0.01026   0.00375  -0.1351   0.4125   0.2393
   2.750   0.5954   0.01034   0.00380  -0.1348   0.4023   0.2417
   3.000   0.6240   0.01039   0.00385  -0.1346   0.3943   0.2440
   3.250   0.6520   0.01048   0.00392  -0.1343   0.3845   0.2459
   3.500   0.6797   0.01057   0.00398  -0.1340   0.3743   0.2484
   3.750   0.7074   0.01066   0.00406  -0.1337   0.3632   0.2515
   4.000   0.7349   0.01075   0.00415  -0.1333   0.3543   0.2546
   4.250   0.7619   0.01085   0.00423  -0.1328   0.3441   0.2576
   4.500   0.7880   0.01098   0.00433  -0.1322   0.3340   0.2601
   4.750   0.8134   0.01113   0.00444  -0.1314   0.3209   0.2628
   5.000   0.8392   0.01127   0.00456  -0.1307   0.3077   0.2670
   5.250   0.8636   0.01147   0.00472  -0.1298   0.2915   0.2707
   5.500   0.8864   0.01173   0.00490  -0.1286   0.2715   0.2739
   5.750   0.9077   0.01208   0.00513  -0.1271   0.2487   0.2763
   6.000   0.9283   0.01246   0.00541  -0.1256   0.2258   0.2791
   6.250   0.9495   0.01284   0.00570  -0.1242   0.2045   0.2829
   6.500   0.9706   0.01323   0.00601  -0.1228   0.1856   0.2865
   6.750   0.9916   0.01362   0.00632  -0.1214   0.1696   0.2898
   7.000   1.0115   0.01404   0.00666  -0.1198   0.1538   0.2926
   7.250   1.0308   0.01448   0.00703  -0.1181   0.1382   0.2955
   7.500   1.0507   0.01491   0.00739  -0.1166   0.1243   0.2997
   7.750   1.0710   0.01531   0.00776  -0.1151   0.1132   0.3040
   8.000   1.0910   0.01571   0.00812  -0.1135   0.1050   0.3082
   8.250   1.1106   0.01611   0.00850  -0.1120   0.0974   0.3113
   8.500   1.1305   0.01650   0.00888  -0.1105   0.0904   0.3157
   8.750   1.1503   0.01692   0.00929  -0.1089   0.0844   0.3202
   9.000   1.1689   0.01737   0.00973  -0.1073   0.0790   0.3242
   9.250   1.1872   0.01783   0.01018  -0.1056   0.0737   0.3277
   9.500   1.2052   0.01832   0.01066  -0.1039   0.0687   0.3307
   9.750   1.2225   0.01886   0.01119  -0.1022   0.0636   0.3356
  10.000   1.2389   0.01942   0.01176  -0.1004   0.0592   0.3406
  10.250   1.2558   0.01999   0.01233  -0.0987   0.0551   0.3455
  10.500   1.2715   0.02062   0.01296  -0.0968   0.0516   0.3491
  10.750   1.2870   0.02127   0.01363  -0.0951   0.0484   0.3545
  11.000   1.3027   0.02194   0.01432  -0.0934   0.0456   0.3602
  11.250   1.3166   0.02271   0.01511  -0.0916   0.0429   0.3652
  11.500   1.3313   0.02346   0.01588  -0.0899   0.0407   0.3693
  11.750   1.3444   0.02434   0.01678  -0.0881   0.0384   0.3748
  12.000   1.3578   0.02523   0.01771  -0.0865   0.0364   0.3803
  12.250   1.3700   0.02622   0.01872  -0.0849   0.0344   0.3852
  12.500   1.3818   0.02727   0.01980  -0.0832   0.0328   0.3895
  12.750   1.3931   0.02840   0.02096  -0.0817   0.0310   0.3944
  13.000   1.4039   0.02962   0.02223  -0.0803   0.0296   0.4004
  13.250   1.4145   0.03089   0.02355  -0.0789   0.0282   0.4055
  13.500   1.4239   0.03231   0.02499  -0.0776   0.0269   0.4100
  13.750   1.4331   0.03379   0.02651  -0.0763   0.0257   0.4140
  14.000   1.4422   0.03536   0.02814  -0.0753   0.0246   0.4208
  14.250   1.4504   0.03706   0.02989  -0.0743   0.0236   0.4268
  14.500   1.4577   0.03888   0.03176  -0.0733   0.0227   0.4318
  14.750   1.4654   0.04074   0.03366  -0.0725   0.0219   0.4357
  15.000   1.4723   0.04274   0.03573  -0.0718   0.0211   0.4414
  15.250   1.4786   0.04487   0.03791  -0.0712   0.0203   0.4478
  15.500   1.4836   0.04718   0.04028  -0.0708   0.0196   0.4540
  15.750   1.4888   0.04954   0.04270  -0.0704   0.0191   0.4589
  16.000   1.4943   0.05194   0.04517  -0.0702   0.0185   0.4650
  16.250   1.4988   0.05452   0.04782  -0.0700   0.0180   0.4711
  16.500   1.5019   0.05733   0.05070  -0.0700   0.0175   0.4771
  16.750   1.5045   0.06024   0.05367  -0.0702   0.0170   0.4823
  17.000   1.5068   0.06328   0.05678  -0.0704   0.0165   0.4890
  17.250   1.5092   0.06640   0.05999  -0.0708   0.0162   0.4961
  17.500   1.5120   0.06950   0.06317  -0.0712   0.0159   0.5026
  17.750   1.5134   0.07282   0.06655  -0.0718   0.0155   0.5076
  18.000   1.5140   0.07637   0.07020  -0.0726   0.0152   0.5149
  18.250   1.5152   0.07986   0.07376  -0.0733   0.0149   0.5229
  18.500   1.5142   0.08374   0.07772  -0.0744   0.0145   0.5293
  18.750   1.5129   0.08771   0.08177  -0.0755   0.0143   0.5361
  19.000   1.5121   0.09164   0.08579  -0.0767   0.0140   0.5435
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