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为了比较线型聚能切割器轴向内直角相连和外直角相连时的射流形成特性,采用数值模拟方法进行了射流形成研究,并通过实验进行了验证。结果表明:切割器外直角连接产生的片状射流在侧边和直角连接处之间逐渐由宽变窄,而且随着侧边射流的不断向前运动,连接处射流将被不断地向两侧拉伸,最终产生断裂,其侵彻能力相对侧边的射流减弱较大;而切割器内直角连接时,两侧片状射流均向内运动,在连接处碰撞形成速度较高的射流,其侵彻能力比两侧的射流要强,数值模拟结果与实验结果相吻合。由于容器在直角连接处部分的断面尺寸比其他部分容器壁的尺寸要大,在条件许可的情况下应采用轴向内直角相连从外部对容器或零部件进行切割。
In order to compare the jet formation characteristics when the linear converging cutters are connected at right angles and at right angles, a numerical simulation method was used to study the jet formation. Experiments were carried out to verify the jet formation characteristics. The results show that the flake jets produced at the right angle of the cutter gradually become narrower from side to side at right angles, and the jets at the junction will be continuously jetted to the sides as the jets continue to move forward Stretching, and ultimately fracture, the penetration of the relative side of the penetration weakened larger; and cutter connected at right angles, both sides of the flake jets move inward, collide at the junction to form a high velocity jet, which Penetration ability is stronger than jet on both sides, and the numerical simulation results are in good agreement with the experimental results. Since the cross-sectional dimensions of the container at the right-angle junctions are larger than the dimensions of the other container walls, the containers or parts should be cut externally, at the right angles to the inside, where possible.