純酸素上吹転炉操業における超音速ジェット特性の効果

抄録

Theoretical equations determining the profile of cavity in steel bath are proposed based on the previous analysis on the mixing problems involving momentum, energy and mass transfers in turbulent axially symmetric compressible flow of supersonic jet.
As the results, the change of cavity profile caused by the variation of the conditions of surrounding gas around a jet and characteristics (velocity, temperature and compositions) of a jet impinging on the surface of cavity can be estimated with the progress of blowing time. During the blowing time, the amount of oxygen which does not arrive on the surface of cavity are obtained from the relations between the radial distributions of oxygen in a jet and cavity profile.
Also, the operating conditions at the limit of occurance of shock wave in a jet impingiug at stagnation point of cavity and the problems of mutual interference of cavities are analyzed in this paper.