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为研究高功率脉冲电流作用下轨道电磁发射装置中枢轨滑动界面的熔融和沉积特性,在同一峰值脉冲电流下,通过控制电枢触发位置进行发射试验,模拟了不同发射阶段的滑动界面熔蚀特征。试验采用4种不同尺寸的C形电枢,比较了不同初始接触状态对初始熔蚀的影响。结果表明:电枢接触表面出现液态金属流动特征和熔融溢出现象;电枢接触边缘首先发生熔蚀,其轴向位置与初始接触状态紧密相关;随着脉冲电流作用时间增长,熔蚀区域向电枢前部和中部扩散,较大的接触力/接触面积有利于保持界面熔融层和减小能耗。试验结果可为进一步精确模拟界面复杂物理过程提供可靠的参考。
In order to study the melting and deposition characteristics of the sliding interface of the orbit electromagnetic launch device under the high power pulse current, the launching test was conducted by controlling the armature triggering position under the same peak pulse current to simulate the erosion characteristics of the sliding interface at different emission stages . Four different sizes of C-shaped armatures were used in the experiment, and the effects of different initial contact conditions on the initial erosion were compared. The results show that the flow of molten metal and the phenomenon of melt overflow appear on the contact surface of the armature. The contact edge of the armature firstly melts and its axial position is closely related to the initial contact state. With the increase of the pulse current, Pivotal front and middle diffusion, the larger contact force / contact area is conducive to maintaining the interface melt layer and reduce energy consumption. The test results can provide a reliable reference for further accurately simulating complex physical processes in the interface.