AIAA CFD Drag Prediction Workshop

A 2-Day Workshop Preceding the 19th APA Conference
9-10 June 2001, Anaheim, CA

Objectives

To assess the state-of-the-art computational methods as practical aerodynamic tools for aircraft force and moment prediction.
To provide an impartial forum for evaluating the effectiveness of existing computer codes and modeling techniques using Navier-Stokes solvers.
To identify areas needing additional research and development.

Focus

The focus of this workshop is on drag prediction accuracy. The DLR-F4 test cases have been chosen that address a subsonic wing/body transport configuration flying at subsonic through transonic speeds. The prediction of drag polar and drag rise is particularly emphasized.
A statistical framework is used to assess the comparisons within the computational results and with the test results.

Workshop Information

Note on use of links below: Clicking on a link will result in display or download of the linked file depending on whether the file extension is associated with an application on your machine or not.

Results

The final schedule with links to the presentations and some comments by the participants.

Participant List

participant_list.html

Test Cases

Definition of test conditions for required and optional test cases:

Test conditions: cases.pdf, 5KB

A description of how the geometry was put together:

Geometry

Required Data for Submittal of Results

Sample Form: format.pdf, 9KB

Blank Form: skeleton.txt, 2KB

DLR-F4 Data Reference:

AGARD-AR-303, Aug. 1994: agard-ar-303.pdf, 742KB

Data files: bwma60.txt (18KB), bwma75.txt (17KB), bwma80.txt (17KB), cpdra.txt (48KB), cpnlr.txt (48KB), cpone.txt (52KB). See Tables 1-3 in AGARD-AR-303 for a description of the data files.

Do not consider the data in this report the "correct" answer. The computations for this workshop will be fully turbulent. We are not necessarily testing how well we can match wind tunnel data (you will note the drag data is provided with only 2 significant digits). The statistical analysis will emphasize the comparisons within the computational results.

Statistical Framework:

The following link describes the statistical framework that will be used to compare the code results from the participants and includes a detailed example based on the results from a similar, but less extensive, study done in Europe. Statistical Framework

FAQ

Frequently Asked Questions

Workshop Committee

Participant	Affiliation
Shreekant Agrawal	The Boeing Company Phantom Works
David W. Levy	The Cessna Aircraft Company
John Vassberg	The Boeing Company Phantom Works
Tom Zickuhr	The Cessna Aircraft Company
Richard A. Wahls	Configuration Aerodynamics Branch NASA Langley Research Center
Michael J. Hemsch	Research Facilities Branch NASA Langley Research Center
Bastiaan Oskam	National Aerospace Laboratory, NLR
Shahyar Pirzadeh	Configuration Aerodynamics Branch NASA Langley Research Center
Rick Matus	Pointwise, Inc.
Juergen Quest	ETW GmbH

For more information . . .

Contact the work shop

Workshop email: dpw@cessna.textron.com

Printable tri-fold brochure

Brochure: flyer7.pdf, 45KB (Adobe Acrobat File Reader format)

Wing-body test case

Color graphic: dpwfig1.jpg, 43KB

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