Abstract
Cavitation and internal nozzle flow have substantial influences on fuel flow rate, external spray, air-fuel mixing, combustion, and emission characteristics in diesel engines. Understanding the link between internal nozzle flow and spray processes is essential to improve diesel injection systems that employ direct fuel injection with complicated injection strategies such as high-pressure injection and multiple injections. However, despite the importance of, cavitation and injector flow investigations into them have been inconclusive, owing to the complex nature of two-phase flow. The objective of this chapter is to provide an overview of recent studies on cavitating flow analysis using optical diagnostics for a better understanding of the interaction between cavitation and sprays in high-pressure diesel injection systems.
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