The theoretical analysis and numerical simulation of the metal jet incoherence

Abstract

Abstract. By the analysis of the classic jet theory and literature, the regions of no-jet, convergent jet and incoherent jet are given in convergent point coordinate system. The theoretical analysis of metal jet incoherence formation explains Walker's jet incoherence theory which is based on experiment, and it's proved that in the supersonic portion of the metal jet, both the incoherence jet and the convergence jet can be formed. The jet incoherence estimation equation is given by our theoretical analysis. At last the numerical simulation of the copper jet formation process at different speeds and angles is done. The typical images of bifurcated jet, hollow jet and dense rarefaction jet are given by calculations to confirm the theoretical analysis results.