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Simulation Objective • Accurate, effective and efficient CFD approach to simulation of transient shock discontinuities – Shock wave identification and tracking – Shock front resolution – Interaction of shocks with objects CFD image of a blast wave 4 Blast wave resulting from a pipe burst in the bleed system of a jetliner
Simulation Approach • CFD finite-volume utilized rather than Lagrangian – Lower computational overhead. – Better flow prediction capabilities. – Solution based grid adaption. – Best in situations where blast does not cause structural deformation. – Can be coupled to FEA solvers to determine deformations and loading of structural components • Significant improvements to adaptation schemes are required to make CFD simulations feasible. 5
Page 1 and 2: 2008 International ANSYS Conference
Page 3: Blast Waves • A blast wave is the
Page 7 and 8: Validation 1 - Small Caliber Gun Re
Page 9 and 10: BWIP Development Rationale • Stan
Page 11 and 12: Validation 2 - Mesh and Solution-ba
Page 13 and 14: Validation 2 - Results Mesh Static
Page 15 and 16: Advanced BWIP Development max p •
Page 17 and 18: Validation 3 - Side-on Pressure 17
Page 19 and 20: Validation 3 - Maximum Overpressure
Page 21 and 22: Validation 3 - Animation 2 21
Page 23 and 24: Validation 4 - Fixed Mesh vs BWIP F
Page 25 and 26: Overpressure (psi) 15 10 Validation
Page 27: Conclusions • High-quality 3-D bl

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