Experimental data


The datas shown on this page are measured on the 2.16% NASA-CRM model using JAXA wind tunnel test.

Reference Area, S = 0.179014 m2

Reference Chord, c = 0.15131 m( = MAC)

Reference Span, b = 1.26927 m( = span)

Moment Reference (X,Y,Z) = (0.72741, 0.0, 0.097627) m


For more details on the data, see the following references:

Shunsuke Koike, Makoto Ueno, Kazuyuki Nakakita and Atsushi Hashimoto, "Unsteady Pressure Measurement of Transonic Buffet on NASA Common Research Model", AIAA 2016-4044, June 2016.


Aerodynamic coefficients

The values are corrected for JAXA wind tunnel test.



RunNo. CaseNo. Re P0 T0 M α CD CL CmS CSV file
4912 20 1.52 80.0 323 0.849 1.22 0.0209 0.2718 6.503e-2 buffet_cdclcm_dpw8.csv
(Data from CaseNo.16 to 45)
4912 21 1.52 80.0 323 0.849 2.29 0.0249 0.4237 2.508e-2
4912 31 1.52 80.0 323 0.849 4.84 0.0588 0.6872 -0.193e-2
4912 41 1.52 80.0 323 0.848 5.89 0.0780 0.7598 0.984e-2
Re : Reynolds number [million] based on MAC
P0 : Total pressure [kPa]
T0 : Total temperature [K]
M : Corrected mach number [-]
α : Corrected angle of attack [deg]
CD : Corrected drag coefficient [-]
CL : Corrected lift coefficient [-]
CmS : Corrected pitching moment coefficient [-]


Cp distributions (Average,RMS)

Cp datas were meatured by the following two sensors.

- Cp by steady pressure sensor (ESP)

- Cp of average and RMS by unsteady pressure sensor (Kulite)


Position of span y[mm] η Cp data (CSV format)
Section E 317.318 0.500 buffet_wingcp_dpw8.csv
Section F 380.781 0.600


Unsteady pressure data (Time history,PSD)

Cp datas by unsteady pressure sensor (Kulite)


Port
No.		 x/c
(Upper surface)		 Position of
span		 Cp data
(CSV format)
CH1 0.2819 Section E
η = 0.500

Time history(α=1.22deg):
buffet_cp_time_aoa122.csv

Time history(α=2.29deg):
buffet_cp_time_aoa229.csv

Time history(α=4.84deg):
buffet_cp_time_aoa484.csv

Time history(α=5.89deg):
buffet_cp_time_aoa589.csv


PSD [1/Hz](α=1.22deg):
buffet_cp_psd_aoa122.csv

PSD [1/Hz](α=2.29deg):
buffet_cp_psd_aoa229.csv

PSD [1/Hz](α=4.84deg):
buffet_cp_psd_aoa484.csv

PSD [1/Hz](α=5.89deg):
buffet_cp_psd_aoa589.csv
CH2 0.3040
CH3 0.3260
CH4 0.3480
CH5 0.3700
CH6 0.3920
CH7 0.4140
CH8 0.4360
CH9 0.4581
CH10 0.5700
CH11 0.6800
CH12 0.7903
CH13 0.1605 Section F
η = 0.600
CH14 0.1854
CH15 0.2102
CH16 0.2351
CH17 0.2600
CH18 0.2848
CH19 0.3097
CH20 0.3346
CH21 0.3595
CH22 0.4950
CH23 0.6310
CH24 0.7677

*PSD of Cp are calculated from time history data under the following conditions

Δt [s] : 0.00002
Number of samplings : 499,712
Number of samplings per block : 8,192
Number of averages : 121
Overlap : 0.5 (50%)
Window function : Not used
Output values : One-sided power spectral density
Unit : 1/Hz
Normalization : The integral value of PSD corresponds to the RMS in the time direction.


Deformation informations

Deformation is considered only in the z-direction.

The deformation is averaged over 10 images (more info will be added).



Position before deformation AoA = 1.22deg AoA = 2.29deg AoA = 4.84deg AoA = 5.89deg
Marker ID x[mm] y[mm] z[mm] Δz[mm] Δα[deg] Δz[mm] Δα[deg] Δz[mm] Δα[deg] Δz[mm] Δα[deg]
201 558.610 105.191 -15.721 0.357 0.389 0.295 0.287
202 651.608 105.191 -22.207 0.439 -0.023 0.463 -0.022 0.382 -0.021 0.393 -0.028
203 744.183 105.191 -35.747 0.425 0.457 0.360 0.374
204 632.574 215.746 -16.204 0.525 0.594 0.447 0.450
205 699.777 215.746 -16.136 0.635 -0.097 0.746 -0.123 0.600 -0.127 0.600 -0.132
206 766.844 215.746 -23.570 0.754 0.882 0.746 0.759
207 729.204 350.702 -9.925 1.071 1.414 1.373 1.414
208 780.545 350.702 -7.286 1.302 -0.263 1.707 -0.333 1.718 -0.418 1.779 -0.423
209 832.002 350.702 -11.605 1.543 2.011 2.122 2.173
210 836.606 498.954 5.173 2.612 3.662 4.345 4.438
211 873.418 498.954 7.676 2.907 -0.456 4.020 -0.560 4.819 -0.722 4.913 -0.721
212 910.394 498.954 5.397 3.199 4.381 5.273 5.365
213 880.023 558.864 13.814 3.440 4.853 5.977 6.094
214 910.963 558.864 16.284 3.678 -0.507 5.182 -0.627 6.364 -0.773 6.456 -0.784
215 942.081 558.864 14.538 3.987 5.530 6.812 6.940
216 923.446 618.774 23.298 4.336 6.146 7.689 7.799
217 948.521 618.774 25.615 4.487 -0.447 6.356 -0.573 7.984 -0.774 8.111 -0.769
218 973.781 618.774 24.835 4.725 6.646 8.364 8.470
Δz : Amount of deflection
Δα : Amount of torsion


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