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- W2103303414 abstract "Introduction development of a parallelized aerodynamic simulation process involving moving bodies is presented. implementation of this process is demonstrated using the Beggar code. Coarse grain parallelism of the solution process is obtained using domain decomposition and functional decomposition techniques on a shared memory, MIMD computer achitecture. Explicit message passing is implemented using PVM. Separation trajectories for a three store ripple release are compared with previous calculations on single processors and execution times are presented along with an analysis of parallel efficiency. Overlapping of the computation of the flow solver and the grid assembly process improves the parallel efficiency of solving moving body problems. 'Research Engineer, Senior Member AIAA f Technical Advisor, Computational Mechanics Branch, Assessments and Demonstrations Division, Associate Fellow AIAA J Professor and Chairman, Department of Aerospace Engineering, Mechanics and Engineering Science, Associate Fellow AIAA The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the Air Force Office of Scientific Research or the U.S. Government. This paper is declared a work of the U.S. Government and is not subject to copyright protection in the United States. knowledge of forces and moments induced by the addition of stores to an aircraft is vital for the safe carriage of those stores. Once a store is released, knowledge of the interference aerodynamics and the effects on the trajectory of the store is vital for the safty of the pilot and aircraft. Such aerodynamic data has traditionally been provided by wind tunnel testing or flight testing; however, these techniques can be very expensive and have limitations when simulating time accurate, moving body problems. Computational Fluid Dynamics (CFD) provides a way to supplement wind tunnel and flight test data. Air Force SEEK EAGLE Office (AFSEO) at Eglin Air Force Base, Florida is using CFD to calculate carriage loads and store separation trajectories for complex aircraft and store configurations for use in the store certification process. As an example of the configurations being addressed, reference [1] presented store separation trajectories from an F-16 aircraft configuration including a fuel tank, pylon, and an aerodynamic fairing at the junction of the pylon and the wing. Reference [2] presented separation trajectories for the MK-84 from the F15E aircraft. Included in this configuration were a centerline fuel tank, a LANTIRN targeting pod, an inboard conformal fuel tank (CFT) weapons pylon with attached MK-84, forward and middle stub pylons on the outside of the CFT, LAU-128 rail launchers with AIM-9 missies on both sides of the wing weapons pylon, and the MK-84 to be released from the wing weapons pylon. Both references compared trajectory calculations to wind tunnel data and were" @default.
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- W2103303414 date "1998-08-10" @default.
- W2103303414 modified "2023-09-24" @default.
- W2103303414 title "Implementations of parallel grid assembly for moving body problems" @default.
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- W2103303414 doi "https://doi.org/10.2514/6.1998-4344" @default.
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