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应用有限差分对喷射成形导流管中的液态金属的流场进行模拟，计算液态金属Fe，Al，Zn在不同过程参数条件下所需的最小过热度△T，得出了最小过热度和材料热物理性质及过程参数之间的半定量关系．计算结果表明，对于最小过热度，导流管的导热能力是最重要的影响因素；在常现使用的过压范围内，增大过压可显著减小过热度；导流管的构形设计也是一关键因素，缩小导流管长度直径比L／D可使△T减小，且对于高熔点金属或高导热能力的导流管影响更为显著．
The finite difference method was used to simulate the flow field of the liquid metal in the spray forming draft tube. The minimum superheat ΔT required by the liquid metal Fe, Al and Zn under different process parameters was calculated and the minimum superheat and the material Semi-quantitative relationship between thermophysical properties and process parameters. The calculation results show that, for the minimum degree of superheat, the thermal conductivity of the draft tube is the most important factor. Over-pressure in the over-pressure range can reduce the superheat significantly. The configuration of the draft tube Is also a key factor. Reducing the length-to-diameter ratio of the draft tube to L / D can reduce ΔT and has a more significant effect on the refractory metal or the draft tube with high thermal conductivity.