CAJ | 학술논문

随着对水下爆炸现象研究的逐步深入，近场水下爆炸的数值模拟研究越来越受到重视。近场水下爆炸数值模拟当中的主要难点在于多相流运动以及界面捕捉方法的研究。文章提出一种较为稳定的近场水下爆炸数值模拟方法，其包含了五阶WENO重构以及HLLC近似黎曼求解器的格式，对于多相流界面的捕捉方法基于γ模型。文中的求解格式通过了一维激波管问题以及二维轴对称问题的验证，计算结果与理论解和实验结果吻合较好。在此基础上将该方法推广到近场水下爆炸过程中冲击波传播以及近水面爆炸现象的模拟，模拟结果较为满意。该文的研究方法能够为后续的近场水下爆炸过程中的空泡以及水射流的研究提供指导。
수착대수하폭작현상연구적축보심입，근장수하폭작적수치모의연구월래월수도중시。근장수하폭작수치모의당중적주요난점재우다상류운동이급계면포착방법적연구。문장제출일충교위은정적근장수하폭작수치모의방법，기포함료오계WENO중구이급HLLC근사려만구해기적격식，대우다상류계면적포착방법기우γ모형。문중적구해격식통과료일유격파관문제이급이유축대칭문제적험증，계산결과여이론해화실험결과문합교호。재차기출상장해방법추엄도근장수하폭작과정중충격파전파이급근수면폭작현상적모의，모의결과교위만의。해문적연구방법능구위후속적근장수하폭작과정중적공포이급수사류적연구제공지도。
The Simulation of near-field Underwater Explosion (UNDEX) was heightened interest with the development of underwater explosion research. The primary concerns that arise in the simulation of near-field underwater explosion are multi-component flows evolvement and interface capturing. In this paper, a robust numerical method for simulation of near-field underwater explosion was pro-posed, which combine five-order WENO construction and HLLC approximate Riemann solver, and the multi-component flow interface capturing method is based on the γ-model. This scheme was tested by 1D shock tube problem and 2D axis-symmetric problem, which show good agreement with theo-ry results or experiment data. Then this method was applied to simulate some phenomenon in near-field underwater explosion such as propagation of shock wave and blast near a free surface, which all show approval results. This method could provide some enlightenment in the research of cavitation and water-jet effect in near-field underwater explosion for future.