ディーゼル機関用燃料多孔ノズルの油キャビテーション特性

抄録

Cavitation characteristics of multihole diesel-fuel nozzles, especialy on the effects of static pressure, oil temperature and nozzle shape, were systematically investigated in high-speed oil fiows under several hydrodynamic conditions. Practical diesel nozzles, 110°∼160°in hole angle, 0.20∼0.35mm in hole diameter, 5.5∼6.5 in hole length/diameter ratio, and 5∼9 in number of holes, were tested in typical gas-oil flows in a wide range of cavitation number σ from a subcavitating state to a supercavitating state. Marked cavitation effects on the flow coefficient and the critical cavitation number are also shown in detail.