NASA Technical Reports Server (NTRS) 20170006533: NASA ERA Integrated CFD for Wind Tunnel Testing of Hybrid Wing-Body Configuration NASA ERA Integrated CFD for Wind Tunnel Testing of Hybrid Wing-Body Configuration

4.6 MB·English

by  NASA Technical Reports Server (NTRS)

NASA ERA Integrated CFD for Wind Tunnel
Testing of Hybrid Wing-Body Configuration
Joseph A. Garcia, John E. Melton, Michael Schuh, Kevin D. James,
Kurt R. Long
NASA Ames Research Center
Dan D. Vicroy, Karen A. Deere, James M. Luckring,
Melissa B. Carter, Jeffrey D. Flamm
NASA Langley Research Center
Paul M. Stremel, Ben E. Nikaido,
Robert E. Childs
Science and Technology Corporation
AIAA SciTech 2016, Jan 4-8 2016, San Diego, CA
www.nasa.gov
Outline
• Overview
• Efficient Use of Multiple CFD tools
• CFD Quality Assessment
• CFD Wind Tunnel Support
• Lessons Learned and Simulation
Guidelines
• Conclusions
2
Overview
• ERA Project explored various
enabling technologies to reduce
environmental impact of aviation.
• Wind tunnel tests performed to
evaluate propulsion-airframe
interference effects.
• Extensive CFD was used to assist these tests in producing
high quality data with minimal hardware interference and
extrapolation to flight.
• High-level summary of how NASA utilized multiple CFD
simulations tools in support of the wind tunnel test.
• CFD simulation guidelines based on post-test aerodynamic
data.
3
CFD Solvers and Methods
• 3 NASA’s CFD Solvers utilized:
s – OVERFLOW
l
o
o • Overset grids via the Chimera Grid Tools
T

D • SA and SST turbulence model
F
C – USM3D

e
l • Unstructured tetrahedral meshes via TetrUSS GridTool
p
i
t
l • SA turbulence model
u
M
– FUN3D

f
o
• Unstructured prismatic/tetrahedral meshes via AFLR3

e
s
• SA turbulence model
u

t
n • 1 Commercial CFD Solver utilized:
e
i
c
– STAR-CCM+
i
f
f
E
• Unstructured prismatic/polyhedral meshes
• SST turbulence model
4
Geometry and Mesh Generation
Sample Overflow Mesh
s
l
o
o Sample FUN3D Mesh
T

D
F
C

e
l
p
i
t
l
u Sample USM3D Mesh
M

f
o
Sample STAR-CCM+ Mesh

e
s
u

t
n
e
i
c
i
f
f
E
5
CFD Quality Assessment
‘Miniwall’ Application
t
n
e
m
s
s
e
s
s
A

y
t
i
l
a
u
Q

D
F
C
6
CFD Wind Tunnel Support
CFD was used to provide highest quality
experimental testing
t
r
o • Sting selection
p
p
u
• Ejector selection
S

l
e
• Acoustic array selection
n
n
u
T • 40’x80’ sting installation

d
n
i
W

D
F
C
7
Sting Selection
Long Aft Sting Long Forward Sting
t
r
o
p
p
u
Short Aft Sting Short Forward Sting
S

l
e
n
n
u OVERFLOW: M = 0.2
∞
T

d
n
i
W

D
F
C
*Simulations run in free air 8
Sting Selection
°
OVERFLOW: M = 0.2 αααα = 12
∞
∆
Cp= (Cp - Cp )
Sting_conf Clean
° °
ββββ = 0 ββββ = 20
°
USM3D: M = 0.2 αααα = 20
∞
t
r
Long Forward Sting
o
p
p
u
S

l
e
n
n
u
T
ββββ = 0° ββββ = 20°
d
n
i Short Forward Sting
W

D
F
C
*Simulations run in free air
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Ejector selection
Short Ejector Long Ejector
°
Overflow: M = 0.2 αααα = 20
∞
t
r
o
p
p
u
∆
S Cp= (Cp - Cp )
Ejector_conf Clean

l
e
n
n
u
T

d
n
i
W

D
F ∆
Cp= (Cp - Cp )
C ShortEject LongEject
*Simulations run in free air 10