Improvement of the technology of castings turbopump assembly aircraft power plants using the computer simulation system LVM Flow CV

The process of solidification of steel castings such as VNL was investigated by the computer simulation using the system LVM Flow CV. Processes of erratic behavior of the melt crystallization front for the first fifty seconds, accompanied by a significant fluctuations in temperature and solidified metal, which bind to the gas evolution at the solidification front and the substantial value of the enthalpy change of crystallization were found. It is proposed to conduct melting in vacuum and use the mold material with a high heat storage capacity. Computer simulation for these conditions showed a monotonic possible temperature and magnitude of melt crystallized in an initial stage of crystallization, reducing by 60 % the duration of the period of crystallization and the creation offavorable conditions for the cooling of the casting. The reliability of the computer simulations was confirmed by the good quantitative agreement between the crystallization temperature according to the results of computer simulation and thermal analysis of the real alloy.