Abstract
Two-phase flows are observed in many industrial machines. Visualization and measurement of two-phase flows in real parts of the machines in the real conditions are important to understand the two-phase flow phenomena in the machines from mechanical engineering points of view. Most of machines are made of metals and optical visualization and measurement of two-phase flows in the machines are often difficult. Neutron radiography is suitable for visualization and the void fraction measurement. Neutron radiography was applied to the two-phase flows in the metallic parts of real and simulated machines. Two-phase flow behavior in a simulated tight lattice rod bundle of a nuclear reactor, a plate heat exchanger, a self-vibrating heat pipe, a fuel injection nozzle for a Diesel engine, and a polymer electrolyte fuel cell (PEFC) are presented.
