The result shows that laser induced plasma and weld geometry are sensitive to sidenozzle height, its inclination angle and side gas flow rate;
结果表明，侧吹喷嘴高度和侧吹流速的变化对光致等离子体行为和焊缝形貌有显著的影响；
2
Generally, the steel rolling furnace's service life is 3-10 years, the wrought steel chamber furnace is about 2 years, and the soaking pit sidenozzle furnace's is 3-6 years.
When the inclination angle of a sidenozzle is 0, 30,45 and 60 degrees, the eddying flow of the bottom hole vortex device will cause rotation at the bottom hole, affecting on the jet from bit nozzles.