Study on standardization of laser cutting technologies for reactor plants, 3; Numerical evaluation of dross ejection process in laser cutting

Sugihara, Kenta ; Nakamura, Yasuyuki ; Ogawa, Takemitsu; Sano, Kazuya ; Muramatsu, Toshiharu

Numerical simulation code, based on multi-phase thermohydraulics, has been being developed with a goal of a control and prediction for the laser cutting process. A thermohydraulic numerical simulation of the laser steel cutting was carried out to confirm an assist gas and sweep velocity effect to the cutting performance. The performance was evaluated, based on temperature profile and cutting front formation. From results of numerical simulation, it was concluded that the thermohydraulics in the kerf takes important role for not only dross ejection but also promotion of heat input at solid surface.