液压阀口典型激振流动及其可视化实验方法

液压阀口通常伴随剧烈的介质流动，诱发空化相变、流体自激、结构振动等复杂气液固耦合激振问题。通过流动可视化实验，获得流动现象的直观捕捉，有助于深入理解现象的物理本质，揭示问题的内在机制，获得合理的建模依据，进而提出解决问题的有效办法。在分析液压阀口流动可视化实验研究进展基础上，综合实验内容要素，阐述了 “看”、“听”、“演”的可视化实验研究方法与技术手段。

Introduction of Representative Flow Oscillations and Experimental Visualization Methods in Hydraulic Valves

Serious oscillating flow frequently occurs in hydraulic valve ports, which causes complex gas liquid solid coupling excitation problems, such as cavitation, self excited oscillation and structural vibration. With the use of flow visualization experiment method, these phenomenons can be caught visually, which helps understand the physical nature of the phenomenon, reveal the internal mechanism of the problem, obtain the basis of modeling and put forward effective solutions. Based on the analysis of the experimental research progress for flow visualization in hydraulic valve port, this paper introduces the visual experimental methods of “watching”, “listening” and “acting” from a generalized view.