Numerical and experimental studies of IFE target layering in a cryogenic fluidized bed

摘要: The redistribution of deuterium (DD) or a deuterium- tritium mixture (DT) to form layer on the inside spherical inertial fusion energy (IFE) capsules is challenging problem because symmetry requirements fuel thickness, smoothness requirement outside target surface, number targets required, and time restriction production process. Several physical processes have been identified interact with each other influence outcome layering process in fluidized bed. These include gas -flow-speed-dependent movement unbalanced spheres through bed resulting local heat transfer coefficient surface from cooling gas. mass speed shell towards uniform final thickness uniformity depend variation -averaged along outer surface. While high flow rate would lead more time-averaged coefficients, high-Z covering has observed deteriorate collisions at impact velocities which occur during fluidization expansions. focus this work was develop numerical tools help model understand physics involved assess key parameters outcome. Two separate models developed independently for particle behavior coupled governing process; these unique boundary conditions, beyond capability currently found commercial software. were validated comparison theoretical results laboratory-scale experiments. They then combined entire used parametric analyses. From analyses, window operating prototypic experiment likely be successful.