Journal of Fluids Engineering · 1976 · 407 citations · 0 references
CavitationCavitating FlowEngineeringHydrodynamic CavitationFluid MechanicsMechanical EngineeringCircular Orifice ElementsOrifice CavitationMultiphase FlowCavitation CharacteristicsAcoustic Cavitation
The study examined cavitation in sharp‑edge circular and rectangular orifices, developed and experimentally validated a simple model across varying back pressure, L/d, and entrance radius, and applied the orifices to unlike‑impinging‑doublet injectors to assess spray mixing uniformity under cavitated and noncavitated conditions. Cavitation markedly decreased spray mixing uniformity for circular orifices, while rectangular orifices maintained uniformity, indicating that orifice shape governs cavitation effects and the findings are broadly applicable.
Cavitation characteristics were determined for sharp-edged orifices. Both circular and rectangular orifices were studied. A simple model is proposed, which was experimentally verified over a range in back pressure, L/d, and entrance radius. Sharp-edge orifices were then incorporated into unlike-impinging-doublet injector elements. The spray mixing uniformity was determined at cavitated and noncavitated conditions. Cavitation was shown to result in a substantial reduction in mixing uniformity for circular orifice elements. Over an identical range in experimental conditions, the rectangular orifice element did not experience lowered mixing uniformity. The orifice cavitation and mixing results should find use in a wide range of applications.