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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.
김채수 ( Kim Chae Soo ),엄대호 ( Um Dae-ho ),한경수 ( Han Kyung Soo ),전택기 ( Jun Teak Ki ),김선주 ( Kim Sun-joo ),최경영 ( Choi Kyung Yong ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-
In this article we developed the environment-friendly arrangement system of drainage and irrigation canal. It is is divided into the model which considers ecological conservation type, irrigation flood control type and hydrophilic type. In canal plan and design we will consider vertical section and intersection plan, water quality management, waterside environment construction plan, canal terminal treatment, canal bottom plan, etc. Consequently, We propose the detail contents which must be considered when we plan the environmental canal space.