Objectives
Close knowledge gaps, develop and validate suitable models for phenomena relevant to release and mixing of LH2. Develop empirical and semi-empirical correlations when applicable. The phenomena include, but are not limited to
- Flashing multiphase, multicomponent release phenomena
- Mass and heat transfer including phase transition (evaporation, condensation and freezing of contaminants) in pools, plumes, jets and sprays
- Free cryogenic jet principle structure, morphology and behaviour in realistic conditions including flammable envelope
- Heat transfer effect on hydrogen concentration in impinging and/or wall attached jets
- Effect of wind speed and direction on large-scale LH2 releases
- Release and dispersion in confined and obstructed spaces, including pressure-peaking phenomena
Led by NCSRD
WP/ Exp. Nr. | Phenomena/ Name | To be investigated | Variation of | Link to results |
---|---|---|---|---|
E3.1a | Small Scale Multi-phase Release | pressure changes in bulk vessel BOS images, laser diagnostics of jet principle structure, potential wall attachment/ impingement | Initial pressure Initial temperature Nozzle shape and cross-sectional area Extraction point (high/gaseous-low/liquid & middle) | bwdatadiss.kit.edu/dataset/179 |
E3.1b | Small Scale Multi-phase Release | pressure changes in bulk vessel BOS images, laser diagnostics of jet principle structure, potential wall attachment/ impingement | Initial pressure; Initial temperature; Nozzle shape and cross-sectional area; Extraction point (high/gaseous-low/liquid & middle) | |
E3.4 | Pool of LH2 | evaporation rate, cold gas mixing, O2 entrainment BOS imaging temperature profile in a gas concentr. profile in a gas | Material of the ground; Initial temperature; Cross-wind | |
E3.5 | Rainout Tests | evaporation rate, pool formation |