Comparison of Predictions of Three Two-Phase Flow Codes
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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Three different two-phase flow codes have been compared by application to a 155mm howitzer high zone charge with input data derived from independent measurements or analysis. Code predictions were compared with firing test values and with a lumped parameter code. Quantitative comparisons are reported for pressure difference waves, peak breech pressure, rise time and travel at peak pressure, flame spreading rate, and CPU time. The major findings were that 1 each code predicts different pressure waves, 2 pressure wave predictions are insensitive to the presence of the central core igniter, and 3 nominal data are inadequate for quantitative predictions.
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