When a new weapon is introduced, target point estimation is one of important objectives in the flight test as well as safe separation. An aircraft OFP(Operational Flight Program) predicts the trajectory of unguided bomb and the ground impact point. The aircraft flow field effect called BSE(Ballistic Separation Effect) is one of the largest miss-distance factors. Especially, in the case of an unguided bomb without control surfaces, the target point is controlled only by the input of pilot. Therefore, an accurate prediction model applied to OFP in the BSE region is important. In this paper, a two step simulation method has been introduced. The first step is unsteady CFD (Computational Fluid Dynamics) calculation in BSE region and second step is off-line simulation using free stream bomb database. The focus of this work is how to switch these two methods. The delta coefficients can be used for the indicator. In the current process, the incremental aerodynamic coefficients in BSE regime are calculated directly and the elimination of those is checked simultaneously.
Prediction of ballistic separation effect by direct calculation of incremental coefficients
Abschätzung des ballistischen Separationseffekts anhand direkter Berechnungen der inkrementellen Luftkraftkoeffizienten
2008
7 Seiten, 9 Bilder, 7 Quellen
Aufsatz (Konferenz)
Englisch
Prediction of Ballistic Separation Effect by Direct Calculation of Incremental Coefficients
Online Contents | 2010
|Ballistic coefficients for power law bodies.
AIAA | 1967
|Comment on Ballistic Coefficients for Power Law Bodies
AIAA | 1967
|Calculation of ballistic segment of trajectory
Engineering Index Backfile | 1964
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