Grid Quality and Resolution Issues from the Drag Prediction Workshop Series
2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida),...
Transcript of 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida),...
![Page 1: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/1.jpg)
2nd Drag Prediction Workshop meetingOrlando (Florida), 21st - 22nd June 2003
F6 model tests in the ONERA S2MA wind-tunnel
J.L. Godard
ONERA, Applied Aerodynamics Department
DP
W
21st
-22n
d J
un
e 20
03 f
ig1
![Page 2: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/2.jpg)
Outline
• F6 model characteristics and instrumentation
• S2MA wind-tunnel and test set-up
• Data processing
• Test program and results
• Conclusions
DP
W
21st
-22n
d J
un
e 20
03 f
ig2
![Page 3: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/3.jpg)
F6 model characteristics and instrumentation
DP
W
21st
-22n
d J
un
e 20
03 f
ig3
![Page 4: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/4.jpg)
Geometrical characteristics of the DLR-F6 model
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig4
![Page 5: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/5.jpg)
Equipment in static pressure taps on the wing
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig5 N osect12345678Y/(B/2)
0.15
0.23
9
0.33
1
0.37
7
0.41
1
0.51
4
0.63
8
0.84
7
![Page 6: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/6.jpg)
Geometry and instrumentation of the engine installation
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig6
![Page 7: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/7.jpg)
S2MA wind-tunnel and test set-up
DP
W
21st
-22n
d J
un
e 20
03 f
ig7
![Page 8: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/8.jpg)
ONERA S2MA wind-tunnel characteristics
DP
W
21st
-22n
d J
un
e 20
03 f
ig8
![Page 9: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/9.jpg)
DLR F6 model in the ONERA S2MA wind-tunnel
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig9
![Page 10: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/10.jpg)
Data processing
DP
W
21st
-22n
d J
un
e 20
03 f
ig10
![Page 11: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/11.jpg)
Corrections on total forces(fuselage-wing-nacelle or fuselage-wing configurations)
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig11
Corrections due to non-homogeneous flow in the test section:• Free-stream Mach number from wall (measurement point) to wind-tunnel axis: for M= 0.75, DM= -0.002• Buoyancy correction: for M= 0.75, DCA= +6.1 10-4
• Wind tunnel upwash: for M= 0.75, Da= +0.038o
Corrections from wind-tunnel walls and model support:• for M= 0.75, CZ= 0.50, a= 1.0o
-> DM= -0.0005, Da= +0.023o, DCA= +5.8 10-4
![Page 12: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/12.jpg)
Installation drag assessmentS4B test bench for nacelle calibration Drag balance
DP
W
21st
-22n
d J
un
e 20
03 f
ig12
![Page 13: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/13.jpg)
S2MA test programme and results
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig13
![Page 14: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/14.jpg)
Summary of the S2MA test program
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig14
Configurations investigated:• Wing-Body-Pylons-Nacelles (WBPN)• Wing-Body (WB)
Aerodynamic conditions:• Mach number 0.60 to 0.85• Lift coefficients 0.00 to 0.60• Reynolds number Rec 3. 106
(cruise conditions: Mach number 0.75, CL 0.50)
Measurement techniques:• Total forces through a 6 component balance• Static pressures on the model
![Page 15: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/15.jpg)
Reproducibility of total force measurements drag axial force incidence
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig1
5
![Page 16: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/16.jpg)
Influence of nacelles installation on total force measurements
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig1
6
![Page 17: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/17.jpg)
Influence of nacelles installation on wing pressure distributionsinternal wing
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig1
7
![Page 18: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/18.jpg)
Influence of nacelles installation on wing pressure distributionsexternal wing
DP
W 2
1st-
22n
d J
un
e 20
03 f
ig1
8
![Page 19: 2 Drag Prediction Workshop meeting - NASA2nd Drag Prediction Workshop meeting Orlando (Florida), 21st - 22nd June 2003 F6 model tests in the ONERA S2MA wind-tunnel J.L. Godard ONERA,](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e23dbe16f45ed1384606a8e/html5/thumbnails/19.jpg)
Conclusions
• Performance tests were executed on the DLR-F6 model in the ONERA-S2MA wind-tunnel for the investigation of engine installation effects
• High quality drag measurements were done for this type of test, within particular a good reproducibility
• The engine installation effects on total forces and static pressuredistributions were clearly identified
DP
W
21st
-22n
d J
un
e 20
03 f
ig19