Research on Detonation and Explosion

爆轰与爆炸研究

• 批准号: RGPIN-2014-05881
• 负责人: Lee, John
• 金额: $ 2.84万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=567447
• 关键词: Research; Detonation; Explosion

Detonations are shock waves sustained by rapid energy release from chemical reactions in an explosive medium. It is of interest to the field of safety in the chemical industries since realistic assessment of risks due to accidental explosions and the design of explosion suppression and mitigation methods require a good knowledge of the detonation phenomenon. Detonation research also contributes towards the understanding of compressible chemical reacting flows, which is of importance to engineers working in hypersonic flows and on advanced propulsion systems. The outstanding problem of detonation research is the lack of the ability to determine the unstable structure of the detonation front. This is required to obtain a length scale to characterize the reaction thickness of the cellular detonations. The thickness of the detonation is required for the determination of all the dynamic detonation parameters (i.e., propagation velocity, initiation energy, detonation limits, etc.). The proposed research focuses on the investigation of the formation and failure of the detonation wave for it is during these processes that the essential propagation mechanisms are prominently revealed. The propagation mechanisms refer to the physical and chemical processes within the detonation structure that are responsible for the self-sustained propagation of the detonation wave. During the formation phase of the detonation, the propagation mechanisms are being developed, whereas during failure, the essential mechanisms are being destroyed. The proposed work is of interest to explosion safety engineers and scientists in defense research establishments. NSERC supported research on explosions at McGill over the past four decades has contributed to establishing the internationally acknowledged expertise of Canada in the field of explosion and detonation. The continuing research of the proposed program serves to maintain this expertise.

爆炸是爆炸性介质中化学反应快速释放能量所维持的冲击波。这对化学工业的安全领域很有意义，因为对意外爆炸造成的风险的实际评估以及爆炸抑制和缓解方法的设计需要对爆炸现象有充分的了解。爆炸研究还有助于理解可压缩化学反应流，这对于从事高超音速流和先进推进系统工作的工程师来说非常重要。爆炸研究的突出问题是缺乏确定爆炸锋面不稳定结构的能力。这是获得长度尺度来表征细胞爆炸的反应厚度所必需的。确定所有动态爆炸参数（即传播速度、起爆能量、爆炸极限等）需要爆炸厚度。拟议的研究重点是对爆震波的形成和破坏的研究，因为正是在这些过程中，显着揭示了基本的传播机制。传播机制是指爆轰结构内负责爆轰波自持传播的物理和化学过程。在爆炸形成阶段，传播机制正在发展，而在爆炸过程中，基本机制正在被破坏。国防研究机构的爆炸安全工程师和科学家对拟议的工作感兴趣。过去四十年来，NSERC 支持麦吉尔的爆炸研究，为加拿大在爆炸和爆炸领域建立国际公认的专业知识做出了贡献。对拟议项目的持续研究有助于维持这种专业知识。