nozzle configuration
1.Flow separation was observed on the expansion ramp at Mach 2.5.To improve off-design performance of single expansion ramp nozzles,variable geometry nozzle configuration should be adopted.
2.The effects of nozzle protrusion, nozzle hole parameters, nozzle-opening pressure, fuel supply advance angle, combustion chamber configuration and working condition on the performance of umbrella-curtain spray (UCS) combustion system were investigated on a single-cylinder diesel engine.
