一、绪言近年来,发表了很多关于液压装置中经常采用的圆柱形节流孔气穴发生的机理和发生的条件的研究。这些研究,一般都是入口锋利的节流孔,在入口缩流处发生的气穴现象。也有对入口有圆形倒角的节流孔,在节流后的喷流处发生的气穴现象的研究。 I. INTRODUCTION In recent years, many studies have been published on the mechanism and occurrence conditions of the cavitation of a cylindrical orifice commonly used in hydraulic devices. These studies, which are generally the sharp-edged entrance to the vent, occur at the inlet contraction cavitation. There is also a round-chamfered orifice at the entrance, a study of cavitation occurring at a throttled jet stream.