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Numerical study on trajectory of released store with manipulation of grid connections

Numerical study on trajectory of released store with manipulation of grid connections This study aims to present a moving grid method based on the manipulation of connections.Design/methodology/approachIn this study, the grid’s connections were manipulated to simulate a released store’s displacement. The selected model in this research is the EGLIN test case. In the introduced method, connections are modified in specific nodes of the grid. Governing flow equations were solved with the finite volume method. The major characteristic of this technique is using the averaging method for calculating the flux of cells.FindingsThis method maintains the grid’s quality even in large displacements of the released store. The three-dimensional simulation was carried out in transonic and supersonic regimes. Comparison of the results with experimental data were highly satisfactory.Research limitations/implicationsUsing this moving grid method is recommended for simulating other models.Practical implicationsPrediction of store trajectory released from air vehicles is one of the most critical issues under study especially in the design of new stores.Originality/valueThe most prominent advantage of this method is maintaining the grid quality simultaneous with large displacements of the released store. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Numerical study on trajectory of released store with manipulation of grid connections

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Publisher
Emerald Publishing
Copyright
© Emerald Publishing Limited
ISSN
1748-8842
eISSN
1748-8842
DOI
10.1108/aeat-07-2020-0140
Publisher site
See Article on Publisher Site

Abstract

This study aims to present a moving grid method based on the manipulation of connections.Design/methodology/approachIn this study, the grid’s connections were manipulated to simulate a released store’s displacement. The selected model in this research is the EGLIN test case. In the introduced method, connections are modified in specific nodes of the grid. Governing flow equations were solved with the finite volume method. The major characteristic of this technique is using the averaging method for calculating the flux of cells.FindingsThis method maintains the grid’s quality even in large displacements of the released store. The three-dimensional simulation was carried out in transonic and supersonic regimes. Comparison of the results with experimental data were highly satisfactory.Research limitations/implicationsUsing this moving grid method is recommended for simulating other models.Practical implicationsPrediction of store trajectory released from air vehicles is one of the most critical issues under study especially in the design of new stores.Originality/valueThe most prominent advantage of this method is maintaining the grid quality simultaneous with large displacements of the released store.

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Aug 5, 2021

Keywords: Finite volume; Manipulation; EGLIN test; Moving grid; Store

References