Studies on CHF of high heat flux surface by impinging thin planner jet cooling to concave heat surface

摘要

We have proposed two-dimensional planner jet cooling for high heat flux surface in a fission reactor in which a centrifugal force by water flow on concave surface is working effectively. It was made dear that burnout did not occur so long as liquid film existed on heated surface. In this study, CHF in impinging planer jet using more narrow nozzlle were investigated under higher flow velocity to improve CHF. The CHF were affected sensitively by flow rate than velocity of jet flow. When flow velocity become much increase, the CHF decreased due to splashing of water due to reaction force of collision. However; the defect of impinging jet flow cooling was overcome by shifting angle between jet flow and heating surface from 90° to 45°.