| 摘要 |
PURPOSE:To permit to regulate flow of fluid without enlarging the diameter of an outer cylinder for the heat exchanger by a method wherein guide vanes, guiding the fluid, outside of the tube, to inflow windows from a nozzle, are provided in an annular space between the outer cyinder and an inner cylinder to form a spiral flow path. CONSTITUTION:The guide vanes 10, attached spirally to the outer peripheral surface of the inner cylinder 3 for the shell and tube type heat exchanger, change the ununiform flow directions of primary series sodium in the annular space 8, which flowed into the outer cylinder 2 from the inlet nozzle 1, and regulate the flow thereof into spiral flow, therefore, stagnant area is reduced and a flow amount distribution in the annular space 8 is uniformed. Thus, the stagnant area, caused by the separation or the like of the flow, is reduced compared with the flow regulating system utilizing a multitude of holes and, accordingly, the flow of fluid may by regulated and the manufacturing cost of the heat exchanger may be reduced without reducing the pressure in the space 8 by enlarging the diameter of the outer cylinder 2. |
