| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
To realize a low-carbon society, it has been considered that hydrogen produced from brown coal mined in Australia is liquefied and transported to Japan by liquefied hydrogen carrying vessel. When a collision accident occurred during maritime transport, a huge amount of liquefied hydrogen leaks onto the sea, and vaporized hydrogen forms highly flammable gas clouds. If ignited by some sources, it may inflict severe outcomes to vessel, crews and circumstances.
In this study, in order to develop a dispersion model of buoyant plumes, air entrainment model for the one-dimensional integral plume model was studied. An air entrainment phenomena by buoyancy force was modeled by non-Boussinesq formulation of latest energy consistent entrainment model [M. Reeuwijk and J. Craske, "Energy-consistent entrainment relations for jets and plumes", J. Fluid Mech., Vol. 782, pp. 333-355, 2015]. We compared and verified our model with Helium plume experiments and 3D Computational Fluid Dynamics model.
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