Cryogenic hydrogen jet flames

氢气对于到2050年实现净零排放起着重要作用。低温液氢（CryoLH 2）的运输和储存被认为是扩大氢供应基础设施的最有效选择。意外释放的CryoLH 2的点燃将导致喷射火焰。基本的物理是复杂的，涉及低温射流，闪光，强烈的相变，液滴，喷雾，点火和燃烧。对火焰特性和模式随点火位置和点火时刻的变化规律缺乏深入的研究。该项目旨在通过使用经验证的模型进行数值模拟来获得这种洞察力，并为CryoLH 2的安全性提出建议。具体目标包括：1.开发并验证了一个强大的求解器的基础上，在内部代码HiSMART的点火和燃烧的低温液氢射流; 2。使用求解器获得洞察力并填补有关CryoLH 2火焰特性的知识空白。

Hydrogen plays an important role to reach net-zero emissions by 2050. The transport and storage of cryogenic liquid hydrogen (CryoLH2) is considered the most effective option for scaling up the hydrogen supply infrastructure. Ignition of unintended release of CryoLH2 would result in jet flames. The underlying physics is complex involving cryogenic jets, flashing, intense phase change, droplets, spray, ignition, and combustion. Insight is lacking about the evolution of flame characteristics and modes with the variation of ignition location and timing. The project aims to gain such insight through numerical simulations with validated models and formulate recommendations for the safety of CryoLH2. The specific objectives include: 1. Develop and validate a robust solver based on the in-house code HiSMART for the ignition and combustion of cryogenic liquid hydrogen jets; 2. Using the solver to gain insight and fill the knowledge gaps about the flame characteristics of CryoLH2.