Visualization of Boiling Freon Swirl Flow

This paper presents the visualization of flow boiling in a circular tube under swirl flow by the Real Time Neutron Radiography (RTNR) and the ultra-fast X-ray computed tomography scanner (XCT). The twisted tape inserted in the tube generates the swirl flow. The swirl flow affects the void distribution in boiling flow and heat transfer phenomena. RTNR gives the void distribution in the plane orthogonal to the test section. And, the ultra-fast …