【摘要】 <正> 前言在化工、冶金等领域内,广泛地应用高速气体射流(或混有固体粉末熔剂的射流)喷射到液体或熔融金属中,以满足生产上的种种要求。例如,用气体射流对液体进行搅拌、混合过程,用氧气顶吹、底吹、侧吹以及顶、底复合吹炼过程,平炉用氧(顶吹和深吹)、连续炼钢和冰铜的连续吹炼等过程,都是利用高速氧气射流喷入液态金属,在较短的时间内完成各种冶炼反应。在铁水预处理过程中,也有用高更多还原

【Abstract】 Studies on the characteristics of high velocity free gas jet have been reviewed and expressions for the characteristics of supersonic turbulent free gas jet have been improved. The relationships between momentum, mass and energy transfer factors, Ku, Km and Ke of compressible gas jet and momentum factor K_j, velocity distribution factor λ₁, of noncompressible gas jet have been derived on the basis of the experimental studies on characteristics of axis-symmetric supersonic turbulent free gas jet in view of the transfer theory. The experimental studies proved that momentum transfer factor K_j was not a constant It can be expressed as a functional formula of the nozzle exit Maeh number Me. K_j=79.36 1+0.376Me^2.81/1+14Me Several physical models of the interaction between gas jet and melt were also discussed.更多还原