F-16XL Geometry and Computational Grids Used in Cranked-Arrow Wing Aerodynamics Project International

• The objective of the Cranked-Arrow Wing Aerodynamics Project International was to allow a comprehensive validation of computational fluid dynamics methods against the Cranked-Arrow Wing Aerodynamics Project flight database. A major part of this work involved the generation of high-quality computational grids. Before the grid generation, an airtight geometry of the F-16XL, aircraft was generated by a cooperation of the Cranked-Arrow Wing Aerodynamics Project International partners. Based on this geometry description, both structured and unstructured grids have been generated. The baseline structured (multiblock) grid (and a family of derived grids) has been generated by the National Aerospace Laboratory. Although the algorithms used by the National Aerospace Laboratory had become available just before the Cranked-Arrow Wing Aerodynamics Project International and thus only a limited experience with their application to such a complex configuration had been gained, a grid of good quality was generated well within four weeks. This time compared favorably with that required to produce the unstructured grids in the Cranked-Arrow Wing Aerodynamics Project International. The baseline all-tetrahedral and hybrid unstructured grids have been generated at NASA Langley Research Center and the U.S. Air Force Academy, respectively. To provide more geometrical resolution, trimmed unstructured grids have been generated at the European Aeronautic Defence and Space Company's Military Air Systems, University of Tennessee at Chattanooga SimCenter, Boeing Phantom Works, Royal Institute of Technology, and the Swedish Defence Research Agency. All grids generated within the framework of the Cranked-Arrow Wing Aerodynamics Project International will be discussed in the paper. Both results obtained on the structured grids and the unstructured grids showed a significant improvement in agreement with flight-test data in comparison with those obtained on the structured multiblock grid used during the Cranked-Arrow Wing Aerodynamics Project.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Farkostteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Vehicle Engineering (hsv//eng)

Nyckelord

Aircraft

Computational fluid dynamics

Data description

Flight dynamics

Fluid dynamics

Gas dynamics

Mesh generation

NASA

Air systems

Boeing phantom works

Complex configurations

Computational fluid dynamics methods

Computational grids

Cranked-arrow wings

Defence researches

European aeronautic defence and spaces

F-16XL aircraft

Flight-test datum

Geometrical resolutions

Grid generations

High qualities

International partners

Multiblock

Nasa langley research centers

National aerospace laboratories

Royal institute of technologies

Structured grids

Structured multiblock grids

U.s. air force academies

University of tennessee

Unstructured grids

Vehicle engineering

Farkostteknik

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)