Simulation of Gas Flow for Welding Process Control in the Arctic Environment

The Arctic is a very promising region for hydrocarbon production. At the same time, this region is very severe in terms of climate. Low temperatures and high humidity complicate metals welding in the Arctic. These conditions require the protection of the welding zone for high-quality welding. The authors propose to use gas-shielded welding. The authors studied the effect of conditions of gas flow from the nozzle on the characteristics of the jet when gas welding in the Arctic. It was found that the gas flow from the nozzle is effected by the shape and aerodynamic quality of the nozzle flow passage; the type and thickness of the boundary layer on the inner side of the nozzle; the degree of flow turbulence at the nozzle outlet; variation of the velocity at the nozzle outlet; the ratio of the density of the gas jet and surrounding air.