| 摘要 |
<p>PURPOSE:To obtain a predicting method for flow, by which the flow at the time of discharging fluid into a vessel can be predicted by using the shapes and the arrangements of a nozzle and the vessel and flowing velocity, etc., as input variables. CONSTITUTION:The shape of the nozzle, the shape of the vessel, the relative position of the nozzle and the vessel and the discharging velocity Vi of the nozzle are used as the input variables. The flowing velocity distribution is decided by making the flow in the vessel visuablizable based on these input variables by the experiments or a computer, and a radius and an angular velocity of forced vortex are obtd. from the flowing velocity distribution. The input variables are changed, and each procedure is repeated to obtain the function using the input variables as the variables, and the optional nozzle shape, vessel shape, relative position of the nozzle and the vessel and nozzle discharging flowing velocity Vi to be predicted are set. Successively, the coordinate of the vortex center and the radius and the angular velocity of the forced vortex in the input variables set based on the obtd. function are decided, and the flowing velocity distribution in the vessel is set by using the vortex theory. Lastly, a convergent calculation is executed so as to satisfy the law of conservation of mass, and the flowing velocity in the whole range in the vessel is predicted in a short time and at a low cost.</p> |
