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이재민(Jaimin Lee),국정현(Jeong-Hyun Kuk),최경영(Kyung Young Choi),조용수(Yong Soo Cho),송소영(So-young Song) 한국전산유체공학회 1998 한국전산유체공학회 학술대회논문집 Vol.1998 No.-
Underwater explosion properties for TNT, an ideal explosive, and DXD-04, a nonideal explosive, were numerically modeled with a one-dimensional Lagrangian hydrodynamic code. The equation of state parameters for detonation products for TNT and DXD-04 were obtained from the BKW code, assuming complete reaction. Burn of TNT was modeled by using the Chapman-Jouguet(CJ) volume burn technique, a programmed-burn technique, assuming instantaneous detonation reaction. Burn of DXD-04 was modeled by using the same technique and by using the reaction rate calibrated from two-dimensional steady-state de-tonation experiments. The calculations for TNT reproduced the experimental peak pressure of the shock wave propagating through water with an error of 3.0% and the experimental oscillation period of the bubble formed of detonation products with af error of 2.3%. For DXD-04, the CJ volume burn technique could not reproduce the experimental observations. When the reaction rate calibrated from two-dimensional steady-state detonation experimental data, the calculated peak pressure was slightly higher by 7.3% than the experimental data, but the calculated shock profile was in good agreement. The bubble period was reproduced with an error of 1.8%. These results demonstrated that underwater explosion properties for an ideal explosive can be predicted by using a programmed burn technique, and that, however, those for a nonideal explosive can be predicted only when a well-calibrated reaction rate is used.
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