Predictability of detonation wave dynamics in gases: experiment and model development

气体中爆轰波动力学的可预测性：实验和模型开发

• 批准号: DGDND-2017-00017
• 负责人: Radulescu, Matei
• 金额: $ 2.91万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: DND/NSERC Discovery Grant Supplement
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=617741
• 关键词: Predictability; detonation; wave; dynamics; gases

Detonation waves are self-sustained supersonic combustion waves. These waves can be sustained in most energetic media including reactive gases. For safety applications, it is thus desirable to have the predictive capability for the eventual ignition of a detonation wave and for its propagation limits when different mitigation strategies are used. Likewise, propulsion applications of detonation waves (e.g., rotating detonation engines, pulse-detonation engine, oblique detonation engine) require accurate control of the wave initiation and stability. For all practical purposes, the detonation behavior needs to be predicted on scales on the order of meters (engine geometry, detonation arrestors, industrial facility configuration, etc...), whereas the detonation wave thickness phenomena occur at scales comparable to the molecular mean free path, i.e. less than a micron. The detonation phenomenon is thus an inherent multi-scale problem, with multi-scale physics. Adequate predictability of detonation wave dynamics is not currently possible at engineering scales. Achieving such predictability is the main thrust of my long-term research program on gaseous detonations.

爆炸波是自我维持的超音速燃烧波。这些波可以在包括反应性气体在内的大多数能量介质中持续。因此，对于使用不同的缓解策略时，希望最终具有爆炸波的点火及其传播限制的预测能力，因此可以使用安全应用。同样，爆炸波的推进应用（例如，旋转爆炸引擎，脉冲检测引擎，倾斜爆炸引擎）需要准确控制波启动和稳定性。出于所有实际目的，需要根据仪表（发动机几何形状，爆炸引导，工业设施的构型等）进行爆炸行为，而爆炸波厚度现象以与分子平均值相当的尺度发生。自由路径，即小于微米。因此，具有多尺度物理学的爆炸现象是一个固有的多尺度问题。在工程量表上，目前无法进行爆炸波动力学的足够可预测性。实现这种可预测性是我关于气态爆炸的长期研究计划的主要目的。