GEOMETRY FILES
3rd
AIAA CFD High Lift Prediction Workshop
Note that there are two (2) sets of distinct three-dimensional geometry categories being used with
HiLiftPW-3. The first, associated with Test Case 1, is a "clean" (no bracket/fairings) version of the new
NASA High Lift Common Research Model (HL-CRM) (this configuration is also being used for the
Geometry and Mesh Generation Workshop-1). The second, associated with Test Case 2,
is the JAXA Standard Model (JSM), which includes all brackets/fairings. Both the HL-CRM and the JSM also each have
two variations. The HL-CRM includes both (1) a gapped configuration, and (2) a partially-sealed configuration.
The JSM includes both (1) a configuration with no nacelle/pylon, and (2) a configuration with nacelle/pylon.
NASA High Lift Common Research Model (HL-CRM):
A description of the HL-CRM can be found in AIAA Paper 2016-0308 (Lacy & Sclafani).
The following geometry files are being used for grid convergence studies in HiLiftPW-3.
All grids are to be constructed using these geometry files. Description of the Test Cases to be posted on the
Test Cases page.
Five different geometry formats are available. EXCEPT FOR THE PARASOLID FILE, units are in inches.
- Gapped Configuration - to be used for
Test Cases 1a and 1b (Version 1):
- Partially-Sealed Flap Configuration - to be used for
Test Cases 1c and 1d (Version 1):
* Note units of Parasolid file is meters. If using this file, the user
is responsible to translate to inches, as all grids for HL-CRM should be supplied in inches.
Geometric Reference Parameters for the NASA HL-CRM:
- Mean aerodynamic chord (MAC) = 275.8 in, located at y=468.75 in
- Wing semi-span (b/2) = 1156.75 in
- Reference area of the semi-span model = Sref/2 = 297,360.0 in2
- Moment reference center (MRC): x=1325.90 in, y=0.0 in, z=177.95 in
- Note: the y-location for the MRC has been corrected as of 4/29/2020; previously it was listed as y=468.75 in, but
y=468.75 in is the location of the MAC
- An incorrect y-location for MRC makes no difference for the pitching moment, which is the only moment requested
- Aspect Ratio (AR) = b2/Sref = 9.0
Many of the above HL-CRM geometry files have been read successfully into
several different CAD packages. These include: NX, PTC Creo, Solidworks 2014, ANSYS Workbench 16, CADFix 10, and FreeCAD.
It is expected that most grid generation packages should be
able to deal with the files. However, in some tests there have been problems noted when importing some of the files with non-native readers.
If you experience any issues with one or more of the CAD files, please document
your experience and share it with us, or bring it to the workshop. This geometry is being used for a
sister-workshop (held concurrently with the HiLiftPW-3) on
Geometry and Mesh Generation, and the
ease and/or difficulty of working with the geometry files is an important subject that will be covered.
The workshop organizers are also interested to know any and all fixes/changes/tweaks that are "required" when working with
the geometry to build grids. All grids for HL-CRM should be supplied in inches.
If you are generating your own meshes for the HL-CRM configuration in HiLiftPW-3 instead of using the
provided baseline meshes,
you should try to follow the gridding guidelines found on the
Grids page, and the final grids must be uploaded to the HiLiftPW Committee.
Also, MVCE is collecting data about your meshing experience for their
AIAA 1st Geometry and Mesh Generation Workshop
with a questionnaire; see the Grids page for details.
JAXA Standard Model (JSM):
A description of the JSM can be found in AIAA Paper 2010-0684 (Yokokawa et al.).
The following geometry files are being used for a nacelle installation
study in HiLiftPW-3.
All grids are to be constructed using these geometry files. Description of the Test Cases to be posted on the
Test Cases page. Three different geometry formats are available.
Units are in mm.
- Nacelle/Pylon-Off Configuration - to be used for
Test Cases 2a and 2b (Version 2):
- Nacelle/Pylon-On Configuration - to be used for
Test Cases 2c and 2d (Version 2):
Differences between Version 1 (2016-09-07) and Version 2 (2016-10-20) JSM Geometry files:
An apparent mismatch of surface (trim curve) edges at the lower inboard side trailing edge
of all 3 flap fairings has been fixed with a manually created surface. The round surfaces
connected to each of these (3 per flap fairing) have also been replaced with a new surface
to ensure edge to edge matching. This issue was observed in most software packages.
Note that the JSM geometry files used in HiLiftPW-3 purposefully included minor alterations in the gaps in the
following locations (to help with grid generation): (1) between slat side edge and wing main element,
(2) at the inboard side edge of the aft flap, (3) at edges of flap track fairings, (4) between the
nacelle and the pylon, etc. For details, see the presentation slides by Yokokawa et al.:
Intro_JAXA.pdf, also found on the
Workshop Presentations page.
For consistency and to avoid confusion, we required all workshop
participants to use the geometries provided above.
The original geometry files with very narrow gaps in these regions can be found on the page
JSM_narrowgapgeometry.html. Now
that the workshop is over, these geometries are being made available. We recommend that anyone
who makes use of the original narrow-gap geometry files instead of the official workshop geometry files
specifically mentions the difference in gap handling.
Geometric Reference Parameters for the JSM:
- Mean aerodynamic chord (MAC) = 529.2 mm
- Wing semi-span (b/2) = 2300.0 mm
- Reference area of the semi-span model = Sref/2 = 1,123,300.0 mm2
- Moment reference center (MRC): x=2375.7 mm, y=0.0 mm, z=0.0 mm
- Aspect Ratio (AR) = b2/Sref = 9.42
It is expected that most grid generation packages should be
able to deal with the above JSM geometry files.
If you experience any issues with one or more of the CAD files, please document
your experience and share it with us, or bring it to the workshop.
The workshop organizers are also interested to know any and all fixes/changes/tweaks that are "required" when working with
the geometry to build grids. All grids for JSM should be supplied in mm.
Note: HiLiftPW participants
are asked to run on one of the
provided grids
if possible. Participants are also
welcome to create their own grids, but they should try to follow the
gridding guidelines found on the
Grids page, and the final grids (and information about them) must be uploaded to the HiLiftPW Committee.
JAXA's 6.5 m x 5.5 m low-speed wind tunnel (JAXA LWT 1) geometry:
As of 4/20/2022, the geometry of the JAXA LWT 1 is publicly available here.
This is the tunnel in which the JSM was tested.
(See Ito, Y., Murayama, M., Yokokawa, Y., Yamamoto, K., Tanaka, K., and Hirai, T., "Wind Tunnel Installation Effects on
Japan Aerospace Exploration Agency's Standard Model," Journal of Aircraft,
DOI: 10.2514/1.C036741.)
The CAD is provided in the formats CATIA V5R26, STEP, IGES, and STL:
Return to: High Lift Prediction Workshop Home Page
Recent significant updates:
04/20/2022 - Added wind tunnel geometry files for JAXA LWT 1
04/29/2020 - Corrected y-location of moment reference center of the NASA HL-CRM
08/28/2018 - Added aspect ratio information
08/03/2017 - Added NX versions of JSM CAD files
07/07/2017 - Added link to unofficial JSM geometry files
01/16/2017 - Updated the GMGW-1 Questionnaire
10/25/2016 - JSM geometry files updated
09/21/2016 - Added geometry files for JSM configurations
07/22/2016 - replaced the STP file for HL-CRM partially-sealed config
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Responsible NASA Official:
Li Wang
Page Curator:
Li Wang
Last Updated: 04/20/2022
