An investigation of string cavitation in a true-scale fuel injector flow geometry at high pressure
journal contributionposted on 08.04.2010, 09:02 by Ben Reid, Graham Hargrave, Colin Garner, Graham Wigley
String cavitation has been studied in an optical automotive size fuel injector with true-scale flow geometry at injection pressures of up to 2050 bar. The multihole nozzle geometry studied allowed observation of the hole-to-hole vortex interaction and, in particular, that of a bridging vortex in the sac region between the holes. A dependency on Reynolds number was observed in the formation of the visible, vapor filled vortex cores. Above a threshold Reynolds number, their formation and appearance during a 2 ms injection event was repeatable and independent of upstream pressure and cavitation number.
- Mechanical, Electrical and Manufacturing Engineering