The experiments of an oil film visualization technique are accomplished on the surfaces of impeller, inlet segment and partial meet face between inlet segment and volute casing.

对螺旋离心泵叶轮、进水节和进水节与蜗壳交界处的部分端面做了表面油膜、油点试验。

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The liquid crystal results are compared with schlieren photo and oil film method, confirming that it is an effective flow-visualization tool.

液晶显示结果与纹影实验照片和油膜方法进行比较，证实了它是一种非常有效的表面流动显示工具。

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